2008 Chevrolet Tahoe Owners Manual

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the ignition, the hood is not closed, or if there is an emission control system malfunction and the Check Engine Light is displayed. Also, the engine will turn off during a remote vehicle start if the coolant temperature gets too high or if the oil pressure gets low. Vehicles that have the remote vehicle start feature are shipped from the factory with the remote vehicle start system enabled. The system may be enabled or disabled through the DIC. See “REMOTE START” under DIC Vehicle Customization (With DIC Buttons) on page 3-73 for additional information. If your vehicle does not have DIC buttons, see your dealer/retailer to enable or disable the remote vehicle start system. Remote Start Ready If your vehicle does not have the remote vehicle start feature, it may have the remote start ready feature. This feature allows your dealer/retailer to add the manufacturer’s remote vehicle start feature. If your vehicle has the remote start ready feature, the RKE transmitter will have an extended range that allows locking or unlocking of the vehicle from approximately 197 feet (60 m) away. See your dealer/retailer if you would like to add the manufacturer’s remote vehicle start feature to your vehicle. 2-10 Doors and Locks Door Locks {CAUTION: Unlocked doors can be dangerous. (cid:129) Passengers, especially children, can easily open the doors and fall out of a moving vehicle. When a door is locked, the handle will not open it. You increase the chance of being thrown out of the vehicle in a crash if the doors are not locked. So, wear safety belts properly and lock the doors whenever you drive. (cid:129) Young children who get into unlocked vehicles may be unable to get out. A child can be overcome by extreme heat and can suffer permanent injuries or even death from heat stroke. Always lock your vehicle whenever you leave it. (cid:129) Outsiders can easily enter through an unlocked door when you slow down or stop your vehicle. Locking your doors can help prevent this from happening. There are several ways to lock and unlock your vehicle. From the outside, use the Remote Keyless Entry (RKE) transmitter or the key in the driver’s door. From the inside, use the power door locks or manual door locks. To lock or unlock the door with the manual locks, push down or pull up on the manual lock knob. Power Door Locks The power door lock switches are located on the front doors. K(Unlock): Press to unlock the doors. Q(Lock): Press to lock the doors. Delayed Locking When locking the doors with the power lock switch and a door or the liftgate is open, the doors will lock ﬁve seconds after the last door is closed. You will hear three chimes to signal that the delayed locking feature is in use. Pressing the power lock switch twice or the lock button on the RKE transmitter twice will override the delayed locking feature and immediately lock all the doors. This feature will not operate if the key is in the ignition. You can program this feature using the Driver Information Center (DIC). See DELAY DOOR LOCK under DIC Vehicle Customization (With DIC Buttons) on page 3-73. Programmable Automatic Door Locks Vehicles with an automatic lock/unlock feature enable you to program the vehicle’s power door locks. You can program this feature through the Driver Information Center (DIC). See DIC Vehicle Customization (With DIC Buttons) on page 3-73 for more information on DIC programming. 2-11 Rear Door Security Locks Your vehicle has rear door security locks. These prevent passengers from opening the rear doors from the inside. The rear door security locks are located on the inside edge of each rear door. Security Lock Label shown The rear doors must be open to access them. The label showing lock and unlock positions is located near the lock. To set the locks, do the following: 1. Insert the key into the security lock slot and turn it so the slot is in the horizontal position. 2. Close the door. 2-12 When you want to open a rear door when the security lock is on, do the following: 1. Unlock the door by lifting the rear door manual lock, using the power door lock switch, or the Remote Keyless Entry (RKE) transmitter, if the vehicle has one. 2. Open the door from the outside. To cancel the rear door security lock, do the following: 1. Unlock the door and open it from the outside. 2. Insert the key into the security lock slot and turn it so the slot is in the vertical position. Lockout Protection This feature protects you from locking the key in the vehicle when the key is in the ignition and a front door is open. If the driver’s side power door lock switch is pressed when the driver’s door is open and the key is in the ignition, all of the doors will lock and then the driver’s door will unlock. If the passenger’s side power door lock switch is pressed when the front passenger’s door is open and the key is in the ignition, all of the doors will lock and then the front passenger’s door will unlock. Liftgate/Liftglass {CAUTION: It can be dangerous to drive with the liftglass or liftgate open because carbon monoxide (CO) gas can come into your vehicle. You cannot see or smell CO. It can cause unconsciousness and even death. If you must drive with the liftglass or liftgate open, or if electrical wiring or other cable connections must pass through the seal between the body and the liftglass or liftgate: (cid:129) Make sure all other windows are shut. (cid:129) Turn the fan on your heating or cooling system to its highest speed with the recirculation mode off. That will force outside air into your vehicle. See Climate Control System on page 3-23 or Dual Automatic Climate Control System on page 3-26. CAUTION: (Continued) If you have air outlets on or under the instrument panel, open them all the way. If your vehicle has a power liftgate, disable the power liftgate function. See Engine Exhaust on page 2-47. If your vehicle has a power liftgate, see Power Liftgate on page 2-15. To unlock the liftgate, use the power door lock switch or press the door unlock button on the Remote Keyless Entry (RKE) transmitter twice. See Remote Keyless Entry (RKE) System Operation on page 2-5. CAUTION: (Continued) 2-13 (cid:129) (cid:129) The liftgate or liftglass cannot be opened if the rear wipers are in motion. Attempting to open the liftgate or liftglass while the rear wipers are in motion will cause the release of the liftglass or liftgate to delay until the wipers are moved off the liftglass. Both the liftglass and liftgate have an electric latch. If the battery is disconnected or has low voltage, the liftglass and liftgate will not open. The liftglass and liftgate will resume operation when the battery is reconnected and charged. If the battery is properly connected and has adequate voltage, and the liftgate or liftglass still will not function, your vehicle should be taken to a dealership for service. On vehicles with a liftglass, press the button on the underside of the license pocket applique (A) to open it. The liftglass can also be opened by pressing the liftglass release button on the RKE. To open the entire liftgate, press the touchpad on the underside of the liftgate handle (B). The vehicle must be in PARK (P) to open the liftgate. To close the liftgate, use the pull cup or pull strap as an aid. 2-14 Power Liftgate Power Liftgate Operation {CAUTION: It can be dangerous to drive with the liftgate open because carbon monoxide (CO) gas can come into your vehicle. You cannot see or smell CO. It can cause unconsciousness and even death. If you must drive with the liftgate open, or if electrical wiring or other cable connections must pass through the seal between the body and the liftgate: (cid:129) Make sure all other windows are shut. (cid:129) Turn the fan on your heating or cooling system to its highest speed with the recirculation mode off. That will force outside air into your vehicle. See Climate Control System in the index. CAUTION: (Continued) CAUTION: (Continued) If you have air outlets on or under the instrument panel, open them all the way. If your vehicle has a power liftgate, disable the power liftgate function. See Power Liftgate on page 2-15. On vehicles with a power liftgate the button is located on the center console. The vehicle must be in PARK (P) to use the power liftgate feature. &: Press the top of the button to open or close the power liftgate. OFF: Press the bottom of the button for manual operation of the power liftgate. 2-15 (cid:129) (cid:129) The taillamps will ﬂash and a chime will sound when the power liftgate is moving. {CAUTION: You or others could be injured if caught in the path of the power liftgate. Make sure there is no one in the way of the liftgate as it is opening and closing. If you open the liftgate without checking Notice: for overhead obstructions such as a garage door, you could damage the liftgate or the liftgate glass. Always check to make sure the area above and behind the liftgate is clear before opening it. The power liftgate can be power opened and closed in the following ways: (cid:129) Press and hold the power liftgate button on the Remote Keyless Entry (RKE) transmitter until the liftgate starts moving. Remote Keyless Entry (RKE) System Operation on page 2-5 for more information. (cid:129) Pressing the liftgate button on the center console. (cid:129) Pressing the touchpad switch on the outside liftgate handle. Pressing the buttons, or touchpad switch a second time while the liftgate is moving reverses the direction. l: The liftgate can also be closed by pressing the power liftgate button next to the liftgate latch. Press the button a second time during liftgate operation to reverse that operation. 2-16 The power liftgate may be temporarily disabled under extreme temperatures, or under low battery conditions. If this occurs, the liftgate can still be operated manually. If you shift the transmission out of PARK (P) while the power function is in progress, the liftgate power function will continue to completion. If you shift the transmission out of PARK (P) and accelerate before the power liftgate latches closed, the liftgate may reverse to the open position. Cargo could fall out of the vehicle. Always make sure the power liftgate is closed and latched before you drive away. If you power open the liftgate and the liftgate support struts have lost pressure, the lights will ﬂash and a chime will sound. The liftgate will stay open temporarily, then slowly close. See your dealer/retailer for service before using the liftgate. Obstacle Detection Features If the liftgate encounters an obstacle during a power open or close cycle, a warning chime will sound and the liftgate will automatically reverse direction to the full closed or open position. After removing the obstruction, the power liftgate operation can be used again. If the liftgate encounters multiple obstacles on the same power cycle, the power function will deactivate, and you must manually open or close the liftgate. The REAR ACCESS OPEN warning message in the Driver Information Center (DIC) will indicate that the liftgate is open. After removing the obstructions, manually open the liftgate to the full open position or close the liftgate to the fully closed and latched position. The liftgate will now resume normal power operation. Your vehicle has pinch sensors located on the side edges of the liftgate. If an object is caught between the liftgate and the body and presses against this sensor, the liftgate will reverse direction and open fully. The liftgate will remain open until it is activated again or closed manually. Do not force the liftgate open or closed during a power cycle. 2-17 Manual Operation of Power Liftgate To change the liftgate to manual operation, press the switch on the center console to the OFF position. With the power liftgate disabled and all of the doors unlocked, the liftgate can be manually opened and closed. To open the liftgate, press the touchpad on the handle on the outside of the liftgate, and lift the gate open. To close the liftgate, use the pull cup to lower the liftgate and close. The liftgate latch will power close. Always close the liftgate before driving. If the RKE button or the power close button on the liftgate is pressed while power operation is disabled, the lights will ﬂash three times, but the liftgate will not move. It is not recommended that you drive with the liftgate open, however, if you must drive with the liftgate open, the liftgate should be set to manual operation by pressing the OFF switch on the center console. The liftgate has an electric latch. If the battery is disconnected or has low voltage, the liftgate will not open. The liftgate will resume operation when the battery is reconnected and charged. If the battery is properly connected with adequate voltage, the switch is not disabled, and the liftgate still will not function, your vehicle should be taken to a dealer/retailer for service. 2-18 Power Running Boards Your vehicle may have power running boards. The power running boards automatically extend from beneath the vehicle on the side in which the door has been opened. Once the door is closed, the running boards will automatically move back under the vehicle after a brief delay. The vehicle must not be moving for the running boards to extend or retract. The switch used to disable the power running boards is located on the center console below the climate control system. The running boards cannot be disabled in the extended position. Windows {CAUTION: Leaving children, helpless adults, or pets in a vehicle with the windows closed is dangerous. They can be overcome by the extreme heat and suffer permanent injuries or even death from heat stroke. Never leave a child, a helpless adult, or a pet alone in a vehicle, especially with the windows closed in warm or hot weather. 2-19 Power Windows {CAUTION: Leaving children, helpless adults, or pets in a vehicle with the windows closed is dangerous. They can be overcome from extreme heat in warm or hot weather and suffer permanent injuries or even death from heat stroke. Leaving children in a vehicle with the ignition key is dangerous for many reasons, children or others could be badly injured or even killed. They could operate the power windows or other controls or even make the vehicle move. The windows will function with the keys in the ignition and they could be seriously injured or killed if caught in the path of a closing window. Do not leave keys in a vehicle with children. When there are children in the rear seat use the window lockout button to prevent unintentional operation of the windows. 2-20 The power window controls are located on each of the side doors. Driver’s Side shown The driver’s door also has switches that control the passenger and rear windows. The power windows work when the ignition has been turned to ACCESSORY or RUN or when Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 2-27. Press the switch to lower the window. Pull up on the front edge of the switch to raise the window. Express-Down Windows Windows with an express-down feature allow the windows to be lowered without holding the switch. Press down fully on the window switch, then release, to activate the express-down mode. The express-down mode can be canceled at any time by pulling up on the front edge of the switch. Window Lockout o (Window Lockout): The window lockout switch is located with the power window switches on the driver’s door armrest. This feature prevents the rear passenger windows from operating, except from the driver’s position. Press the switch to turn the lockout feature on or off. An indicator light will come on to show the lockout feature is on. Sun Visors Pull the sun visor down to block glare. Detach the sun visor from the center mount and slide it along the rod from side-to-side to cover the driver or passenger side of the front window. Swing the sun visor to the side to cover the side window. It can be moved along the rod from side-to-side in this position also. Lighted Visor Vanity Mirror Your vehicle may have lighted visor vanity mirrors on both the driver’s and passenger’s sun visors. Pull the sun visor down and lift the mirror cover to turn the lamps on. 2-21 Theft-Deterrent Systems Vehicle theft is big business, especially in some cities. Although your vehicle has a number of theft-deterrent features, we know that nothing we put on it can make it impossible to steal. Content Theft-Deterrent Your vehicle may have a content theft-deterrent alarm system. This is the security light. To arm the theft-deterrent system: 1. Open the door. 2. Lock the door with the Remote Keyless Entry (RKE) transmitter or the power door lock switch. The security light will come on to inform the driver the system is arming. If a door is open when the doors are locked, the security light will ﬂash. If the delayed locking feature is turned on, the theft-deterrent system will not start the arming process until the last door is closed and the delay timer has expired. See Delayed Locking on page 2-11. 3. Close all doors. The security light should go off after about 30 seconds. The alarm is not armed until the security light goes off. If a locked door is opened without using the RKE transmitter, a ten second pre-alarm will occur. The horn will chirp and the lights will ﬂash. If the key is not placed in the ignition and turned to START or the door is not unlocked by pressing the unlock button on the RKE transmitter during the ten second pre-alarm, the alarm will go off. Your vehicle’s headlamps will ﬂash and the horn will sound for about two minutes, then will turn off to save the battery power. 2-22 The theft-deterrent system will not activate if the doors are locked with the vehicle’s key or the manual door lock. It activates only if you use the power door lock switch with the door open or the RKE transmitter. You should also remember that you can start your vehicle with the correct ignition key if the alarm has been set off. To avoid setting off the alarm by accident: If you do not want to activate the theft-deterrent system, the vehicle should be locked with the door key after the doors are closed. (cid:129) Always unlock the doors with the RKE transmitter. Unlocking a door any other way will set off the alarm if it is armed. If you set off the alarm by accident, press unlock on the RKE transmitter or place the key in the ignition and turn it to START to turn off the alarm. The alarm will not stop if you try to unlock a door any other way. Testing the Alarm To test the alarm: 1. From inside the vehicle, lower the driver’s window and open the driver’s door. 2. Activate the system by locking the doors with the power door lock switch while the door is open, or with the RKE transmitter. 3. Get out of the vehicle, close the door and wait for the security light to go out. 4. Then reach in through the window, unlock the door with the manual door lock and open the door. This should set off the alarm. While the alarm is set, the power door unlock switch will not work. If the alarm does not sound when it should but the headlamps ﬂash, check to see if the horn works. The horn fuse may be blown. To replace the fuse, see Fuses and Circuit Breakers on page 5-117. If the alarm does not sound or the headlamps do not ﬂash, the vehicle should be serviced by your dealer/retailer. 2-23 (cid:129) PASS-Key® III+ The PASS-Key® III+ system operates on a radio frequency subject to Federal Communications Commission (FCC) Rules and with Industry Canada. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation. This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause interference. 2. This device must accept any interference received, including interference that may cause undesired operation of the device. Changes or modiﬁcations to this system by other than an authorized service facility could void authorization to use this equipment. PASS-Key® III+ uses a radio frequency transponder in the key that matches a decoder in your vehicle. PASS-Key® III+ Operation Your vehicle has PASS-Key® III+ (Personalized Automotive Security System) theft-deterrent system. PASS-Key® III+ is a passive theft-deterrent system. The system is automatically armed when the key is removed from the ignition. The system is automatically disarmed when the key is turned to ON/RUN, ACC/ACCESSORY or START from the LOCK/OFF position. You do not have to manually arm or disarm the system. The security light will come on if there is a problem with arming or disarming the theft-deterrent system. When the PASS-Key® III+ system senses that someone is using the wrong key, it prevents the vehicle from starting. Anyone using a trial-and-error method to start the vehicle will be discouraged because of the high number of electrical key codes. If the engine does not start and the security light on the instrument panel cluster comes on when trying to start the vehicle, there may be a problem with your theft-deterrent system. Turn the ignition off and try again. 2-24 If the engine still does not start, and the key appears to be undamaged, try another ignition key. At this time, you may also want to check the fuse, see Fuses and Circuit Breakers on page 5-117. If the engine still does not start with the other key, your vehicle needs service. If your vehicle does start, the ﬁrst key may be faulty. See your dealer/retailer who can service the PASS-Key® III+ to have a new key made. In an emergency, contact Roadside Assistance. It is possible for the PASS-Key® III+ decoder to learn the transponder value of a new or replacement key. Up to 10 keys may be programmed for the vehicle. The following procedure is for programming additional keys only. If all the currently programmed keys are lost or do not operate, you must see your dealer/retailer or a locksmith who can service PASS-Key® III+ to have keys made and programmed to the system. See your dealer/retailer or a locksmith who can service PASS-Key® III+ to get a new key blank that is cut exactly as the ignition key that operates the system. To program the new additional key: 1. Verify that the new key has a 1 stamped on it. 2. Insert the original, already programmed, key in the ignition and start the engine. If the engine will not start, see your dealer/retailer for service. 3. After the engine has started, turn the key to LOCK/OFF, and remove the key. 4. Insert the new key to be programmed and turn it to the ON/RUN position within ﬁve seconds of turning the ignition to the LOCK/OFF position in Step 3. The security light will turn off once the key has been programmed. 5. Repeat Steps 1 through 4 if additional keys are to be programmed. If you lose or damage your PASS-Key® III+ key, see your dealer/retailer or a locksmith who can service PASS-Key® III+ to have a new key made. Do not leave the key or device that disarms or deactivates the theft deterrent system in the vehicle. 2-25 Starting and Operating Your Vehicle New Vehicle Break-In Notice: Your vehicle does not need an elaborate break-in. But it will perform better in the long run if you follow these guidelines: (cid:129) Keep your speed at 55 mph (88 km/h) or less for the ﬁrst 500 miles (805 km). (cid:129) Do not drive at any one constant speed, fast or slow, for the ﬁrst 500 miles (805 km). Do not make full-throttle starts. Avoid downshifting to brake or slow the vehicle. (cid:129) Avoid making hard stops for the ﬁrst 200 miles (322 km) or so. During this time the new brake linings are not yet broken in. Hard stops with new linings can mean premature wear and earlier replacement. Follow this breaking-in guideline every time you get new brake linings. (cid:129) Do not tow a trailer during break-in. See Towing a Trailer on page 4-49 for the trailer towing capabilities of your vehicle and more information. Following break-in, engine speed and load can be gradually increased. 2-26 Ignition Positions Use the key to turn the ignition switch to four different positions. In order to shift out of PARK (P), ignition must be in the ON/RUN or ACC/ACCESSORY and the regular brake pedal must be applied. A (LOCK/OFF): This position locks the ignition and transmission. It is a theft-deterrent feature. The key can only be removed when the ignition is turned to LOCK/OFF. Notice: Using a tool to force the key from the ignition switch could cause damage or break the key. Use the correct key and turn the key only with your hand. Make sure the key is all the way in. If it is, turn the steering wheel left and right while you turn the key hard. If none of this works, then your vehicle needs service. B (ACC/ACCESSORY): This position lets things like the radio and the windshield wipers operate while the engine is off. Lengthy operation of features such as the radio in the ACC/ACCESSORY ignition position and the ON/RUN position may drain the battery and prevent your vehicle from starting. Do not operate your vehicle in the ACC/ACCESSORY ignition position for a long period of time. C (ON/RUN): This is the position for driving. It is the position the ignition switch returns to after the engine starts, and the key is released. The battery could be drained if you leave the key in the ACC/ACCESSORY or ON/RUN position with the engine off. You may not be able to start your vehicle if the battery is allowed to drain for an extended period of time. D (START): This position starts the engine. Key In the Ignition Never leave your vehicle with the keys inside, as it is an easy target for joy riders or thieves. If you leave the key in the ignition and park your vehicle, a chime will sound, when you open the driver’s door. Always remember to remove your key from the ignition and take it with you. This will lock your ignition and transmission. Also, always remember to lock the doors. The battery could be drained if you leave the key in the ignition while your vehicle is parked. You may not be able to start your vehicle after it has been parked for an extended period of time. Retained Accessory Power (RAP) The following vehicle accessories can be used for up to 10 minutes after the engine is turned off: (cid:129) Audio System (cid:129) Power Windows (cid:129) OnStar® System (if equipped) (cid:129) Sunroof (if equipped) These features work when the key is in ON/RUN or ACC/ACCESSORY. Once the key is turned from ON/RUN to LOCK/OFF, the windows and sunroof continue to work up to 10 minutes until any door is opened. The radio continues to work for up to 10 minutes or until the driver’s door is opened. 2-27 Starting the Engine If your vehicle is a Two-mode Hybrid, see the Two-mode Hybrid manual for more information. Move your shift lever to PARK (P) or NEUTRAL (N). Your engine will not start in any other position – this is a safety feature. To restart when you are already moving, use NEUTRAL (N) only. Notice: Do not try to shift to PARK (P) if your vehicle is moving. If you do, you could damage the transmission. Shift to PARK (P) only when your vehicle is stopped. Starting Procedure 1. With your foot off the accelerator pedal, turn the ignition key to START. When the engine starts, let go of the key. The idle speed will go down as your engine gets warm. Do not race the engine immediately after starting it. Operate the engine and transmission gently to allow the oil to warm up and lubricate all moving parts. Your vehicle has a Computer-Controlled Cranking System. This feature assists in starting the engine and protects components. If the ignition key is turned to the START position, and then released when the engine begins cranking, the engine will continue cranking for a few seconds or until the vehicle starts. If the engine does not start and the key is held in START for many seconds, cranking will be stopped after 15 seconds to prevent cranking motor damage. To prevent gear damage, this system also prevents cranking if the engine is already running. Engine cranking can be stopped by turning the ignition switch to the ACC/ACCESSORY or LOCK/OFF position. Notice: Cranking the engine for long periods of time, by returning the key to the START position immediately after cranking has ended, can overheat and damage the cranking motor, and drain the battery. Wait at least 15 seconds between each try, to let the cranking motor cool down. 2. If the engine does not start after 5-10 seconds, especially in very cold weather (below 0°F or −18°C), it could be ﬂooded with too much gasoline. Try pushing the accelerator pedal all the way to the ﬂoor and holding it there as you hold the key in START for up to a maximum of 15 seconds. Wait at least 15 seconds between each try, to allow the cranking motor to cool down. When the engine starts, let go of the key and accelerator. If the vehicle starts brieﬂy but then stops again, do the same thing. This clears the extra gasoline from the engine. Do not race the engine immediately after starting it. Operate the engine and transmission gently until the oil warms up and lubricates all moving parts. 2-28 Notice: The engine is designed to work with the electronics in your vehicle. If you add electrical parts or accessories, you could change the way the engine operates. Before adding electrical equipment, check with your dealer/retailer. If you do not, your engine might not perform properly. Any resulting damage would not be covered by your vehicle’s warranty. Adjustable Throttle and Brake Pedal On vehicles with this feature, you can change the position of the throttle and brake pedals. This feature is designed for shorter drivers, since the pedals cannot move farther away from the standard position, but can move toward the driver for better pedal reach. No adjustment to the pedals can be made when the vehicle is in REVERSE (R) or while using the cruise control. The switch used to adjust the pedals is located on the instrument panel below the climate control system. Press the arrow at the bottom of the switch to move the pedals closer to your body. Press the arrow at the top of the switch to move the pedals away from your body. Before you start driving, fully press the brake pedal to conﬁrm the adjustment is right for you. While driving, make only small adjustments. Your vehicle may have a memory function which lets pedal settings be saved and recalled. See Memory Seat, Mirrors, and Pedals on page 1-6 for more information. 2-29 Engine Coolant Heater The engine coolant heater, if available, can help in cold weather conditions at or below 0°F (−18°C) for easier starting and better fuel economy during engine warm-up. Plug in the coolant heater at least four hours before starting your vehicle. An internal thermostat in the plug-end of the cord may exist which will prevent engine coolant heater operation at temperatures above 0°F (−18°C). To Use the Engine Coolant Heater 1. Turn off the engine. 2. Open the hood and unwrap the electrical cord. The cord is located on the driver’s side of the engine compartment, near the power steering ﬂuid reservoir. 3. Plug the cord into a normal, grounded 110-volt AC outlet. {CAUTION: Plugging the cord into an ungrounded outlet could cause an electrical shock. Also, the wrong kind of extension cord could overheat and cause a ﬁre. You could be seriously injured. Plug the cord into a properly grounded three-prong 110-volt AC outlet. If the cord will not reach, use a heavy-duty three-prong extension cord rated for at least 15 amps. 4. Before starting the engine, be sure to unplug and store the cord as it was before to keep it away from moving engine parts. If you do not, it could be damaged. How long should you keep the coolant heater plugged in? The answer depends on the outside temperature, the kind of oil you have, and some other things. Instead of trying to list everything here, we ask that you contact your dealer/retailer in the area where you will be parking your vehicle. The dealer/retailer can give you the best advice for that particular area. 2-30 Active Fuel Management™ Your vehicle’s V8 engine may have Active Fuel Management™. This system allows the engine to operate on either all or half of its cylinders, depending on the driving conditions. When less power is required, such as cruising at a constant vehicle speed, the system will operate in the half cylinder mode, allowing your vehicle to achieve better fuel economy. When greater power demands are required, such as accelerating from a stop, passing, or merging onto a freeway, the system will maintain full-cylinder operation. If your vehicle has an Active Fuel Management™ indicator, see DIC Operation and Displays (With DIC Buttons) on page 3-56 or DIC Operation and Displays (Without DIC Buttons) on page 3-62 for more information on using this display. Automatic Transmission Operation If your vehicle is a Two-mode Hybrid, see the Two-mode Hybrid manual for more information. If your vehicle is has an automatic transmission, it has an electronic shift position indicator within the instrument panel cluster. This display comes on when the ignition key is turned to the ON/RUN position. There are several different positions for the shift lever. Hydra-Matic® 4-Speed Automatic Transmission 2-31 Allison Transmission® or Hydra-Matic® 6-Speed Automatic Transmission See “Range Selection Mode” later in this section. PARK (P): This position locks your rear wheels. It is the best position to use when you start the engine because your vehicle cannot move easily. When parked on a hill, especially when the vehicle has a heavy load, you might notice an increase in the effort to shift out of Park. See Torque Lock (Automatic Transmission) under Shifting Into PARK (P) on page 2-44 for more information. {CAUTION: It is dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brake ﬁrmly set. Your vehicle can roll. Do not leave your vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when you are on fairly level ground, always set your parking brake and move the shift lever to PARK (P). See Shifting Into PARK (P) on page 2-44. If you are pulling a trailer, see Towing a Trailer on page 4-49. 2-32 {CAUTION: If you have Four-Wheel Drive, your vehicle will be free to roll — even if your shift lever is in PARK (P) — if your transfer case is in NEUTRAL. So, be sure the transfer case is in a drive gear, Two-Wheel Drive High or Four-Wheel Drive High or Four-Wheel Drive Low — not in NEUTRAL. See Shifting Into PARK (P) on page 2-44. REVERSE (R): Use this gear to back up. Notice: Shifting to REVERSE (R) while your vehicle is moving forward could damage the transmission. The repairs would not be covered by your warranty. Shift to REVERSE (R) only after your vehicle is stopped. To rock your vehicle back and forth to get out of snow, ice, or sand without damaging your transmission, see If Your Vehicle is Stuck in Sand, Mud, Ice, or Snow on page 4-33. NEUTRAL (N): In this position, your engine does not connect with the wheels. To restart when you are already moving, use NEUTRAL (N) only. Also, use NEUTRAL (N) when your vehicle is being towed. {CAUTION: Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is ﬁrmly on the brake pedal, your vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while your engine is running at high speed. Notice: Shifting out of PARK (P) or NEUTRAL (N) with the engine running at high speed may damage the transmission. The repairs would not be covered by your warranty. Be sure the engine is not running at high speed when shifting your vehicle. 2-33 DRIVE (D): This position is for normal driving. It provides the best fuel economy for your vehicle. If you need more power for passing, and you are: (cid:129) Going less than about 35 mph (55 km/h), push your accelerator pedal about halfway down. (cid:129) Going about 35 mph (55 km/h) or more, push the accelerator all the way down. By doing this, the vehicle shifts down to the next gear and has more power. DRIVE (D) can be used when towing a trailer, carrying a heavy load, driving on steep hills, or for off-road driving. You might want to shift the transmission to a lower gear selection if the transmission shifts too often. Downshifting the transmission in slippery road conditions could result in skidding. See Skidding under Loss of Control on page 4-11 Your vehicle has a shift stabilization feature that adjusts the transmission shifting to the current driving conditions in order to reduce rapid upshifts and downshifts. This shift stabilization feature is designed to determine, before making an upshift, if the engine is able to maintain vehicle speed by analyzing things such as vehicle speed, throttle position, and vehicle load. If the shift stabilization feature determines that a current vehicle speed cannot be maintained, the transmission does not upshift and instead holds the current gear. In some cases, this could appear to be a delayed shift, however the transmission is operating normally. Your vehicle’s transmission uses adaptive shift controls. Adaptive shift controls continually compares key shift parameters to pre-programmed ideal shifts stored in the transmissions computer. The transmission constantly makes adjustments to improve vehicle performance according to how the vehicle is being used, such as with a heavy load or when temperature changes. During this adaptive shift control process, shifting might feel different as the transmission determines the best settings. When temperatures are very cold, the Allison Transmission® and Hydra-Matic® 6-Speed transmission’s gear shifting could be delayed providing more stable shifts until the engine warms up. Shifts could be more noticeable with a cold transmission. This difference in shifting is normal. 2-34 MANUAL MODE (M): This position, is available on vehicles with the Allison Transmission® or Hydra-Matic® 6-Speed transmission. It lets drivers select the range of gears appropriate for current driving conditions. If your vehicle has this feature, see Range Select Mode (Allison Transmission® or Hydra-Matic® 6-Speed transmission) later in this section. THIRD (3): This position is also used for normal driving. It reduces vehicle speed more than DRIVE (D) without using the brakes. You might choose THIRD (3) instead of DRIVE (D) when driving on hilly, winding roads, when towing a trailer, so there is less shifting between gears and when going down a steep hill. SECOND (2): This position reduces vehicle speed even more than THIRD (3) without using your brakes. You can use SECOND (2) on hills. It can help control your speed as you go down steep mountain roads, but then you would also want to use the brakes off and on. If you manually select SECOND (2) in an automatic transmission, the transmission will start in second gear. You can use this feature for reducing the speed of the rear wheels when you are trying to start your vehicle from a stop on slippery road surfaces. FIRST (1): For the Hydra-Matic® 4-Speed transmission this position reduces vehicle speed even more than SECOND (2) without using the brakes. You can use it on very steep hills, or in deep snow or mud. If the shift lever is put in FIRST (1) while the vehicle is moving forward, the transmission does not shift into ﬁrst gear until the vehicle is going slowly enough. For an Allison Transmission® or Hydra-Matic® 6-Speed transmission, this position reduces vehicle speed without using your brakes. You can use it for major/severe downgrades and off-road driving where the vehicle would otherwise accelerate due to steepness of grade. When you shift to FIRST (1) it provides the lowest gear appropriate to your current road speed and continues to downshift as the vehicle slows, eventually downshifting to FIRST (1) gear. Notice: Spinning the tires or holding the vehicle in one place on a hill using only the accelerator pedal may damage the transmission. The repair will not be covered by your warranty. If you are stuck, do not spin the tires. When stopping on a hill, use the brakes to hold the vehicle in place. 2-35 When MANUAL MODE (M) is selected a number displays next to the M, indicating the current gear. This number is the highest gear that can be used. However, your vehicle can automatically shift to lower gears as it adjusts to driving conditions. This means that all gears below that number are available. When FIFTH (5) is selected, FIRST (1) through FIFTH (5) gears are automatically shifted by the vehicle, but SIXTH (6) cannot be used until the plus/minus button located on the steering column lever is used to change to the gear. Grade Braking is not available when the Range Selection Mode is active. See Tow/Haul Mode on page 2-37. While using the Range Selection mode feature, cruise control and the Tow/Haul mode can be used. Notice: Spinning the tires or holding the vehicle in one place on a hill using only the accelerator pedal may damage the transmission. The repair will not be covered by your warranty. If you are stuck, do not spin the tires. When stopping on a hill, use the brakes to hold the vehicle in place. Range Selection Mode (Allison® or Hydra-Matic® 6-Speed Transmission) Your vehicle may have a Range Selection Mode. The Range Selection Mode helps control the vehicle’s transmission and vehicle speed while driving down hill or towing a trailer by letting you select a desired range of gears. To use this feature, do the following: 1. Move the shift lever to the MANUAL MODE (M). 2. Press the plus/minus buttons, located on the steering column shift lever, to select the desired range of gears for your current driving conditions. 2-36 Low Traction Mode If your vehicle has the Allison Transmission®, or the Hydra-Matic® 6-Speed Automatic Transmission, it has a Low Traction Mode that assist in vehicle acceleration when road conditions are slippery, such as with ice or snow. While the vehicle is at a stop, select the second gear range using the Range Selection system. This will limit torque to the wheels after it detects wheel slip, preventing the tires from spinning. Tow/Haul Mode You can use this feature to assist when towing or hauling a heavy load or if there is a need to charge a battery installed in a trailer. See Towing a Trailer on page 4-49 for more information. When Tow/Haul mode is selected the Tow/Haul indicator light will come on. The Tow/Haul mode works with the Autoride® feature, if the vehicle has this, to enhance the ride when trailering or with a loaded vehicle. See Autoride® on page 4-49. Your vehicle has a Tow/Haul mode. The selector button is located on the end of the column shift lever. 2-37 Four-Wheel Drive If your vehicle has four-wheel drive, you can send your engine’s driving power to all four wheels for extra traction. Read the part that follows before using four-wheel drive. Notice: Driving on clean, dry pavement in Four-Wheel-Drive High or Four-Wheel-Drive Low for an extended period of time may cause premature wear on your vehicle’s powertrain. Do not drive on clean, dry pavement in Four-Wheel-Drive High or Four-Wheel-Drive Low for extended periods of time. While driving on clean dry pavement and during tight turns, you may experience a vibration in the steering system. Front Axle Locking Feature The front axle locks and unlocks automatically when you shift the transfer case. Some delay for the axle to lock or unlock is normal. Automatic Transfer Case The transfer case knob is located to the left of the instrument panel cluster. Your vehicle has Four Wheel Drive with StabiliTrak®. For information on StabiliTrak®, see StabiliTrak® System on page 4-6. Use this dial to shift into and out of four-wheel drive. You can choose among ﬁve driving settings: Indicator lights in the switches show you which setting you are in. The indicator lights will come on brieﬂy when you turn on the ignition and the last chosen setting will stay on. If the lights do not come on, you should take your vehicle in for service. An indicator light will ﬂash while shifting. Fast ﬂashing means the conditions were not met to make the desired shift, typically the vehicle was going too fast, the automatic transmission 2-38 was not in neutral. Slow ﬂashing means the shift is in progress. It will stay on when the shift is completed. If for some reason the transfer case cannot make a requested shift, it will return to the last chosen setting. 2 m(Two-Wheel Drive High): This setting is used for driving in most street and highway situations. Your front axle is not engaged in two-wheel drive. This setting also provides the best fuel economy. AUTO (Automatic Four-Wheel Drive): This setting is ideal for use when road surface traction conditions are variable. When driving your vehicle in AUTO, the front axle is engaged, but the vehicle’s power is primarily sent to the rear wheels. When the vehicle’s software determines a need for more traction, the system will transfer more power to the front wheels. Driving in this mode results in slightly lower fuel economy than Two-Wheel Drive High. 4 m(Four-Wheel Drive High): Use the four-wheel high position when you need extra traction, such as on snowy or icy roads or in most off-road situations. This setting also engages your front axle to help drive your vehicle. This is the best setting to use when plowing snow. 4 n(Four-Wheel Drive Low): This setting also engages your front axle and delivers extra torque. You may never need this setting. It sends maximum power to all four wheels. You might choose Four-Wheel Drive Low if you are driving off-road in deep sand, deep mud, deep snow, and while climbing or descending steep hills. StabiliTrak® will not engage in this mode. See StabiliTrak® System on page 4-6 for more information. {CAUTION: Shifting the transfer case to NEUTRAL can cause your vehicle to roll even if the transmission is in PARK (P). You or someone else could be seriously injured. Be sure to set the parking brake before placing the transfer case in NEUTRAL. See Parking Brake on page 2-43. NEUTRAL (N): Shift the vehicle’s transfer case to NEUTRAL only when towing your vehicle. See Recreational Vehicle Towing on page 4-45 or Towing Your Vehicle on page 4-45 for more information. If the SERVICE 4 WHEEL DRIVE message stays on, you should take your vehicle to your dealer for service. See “SERVICE 4 WHEEL DRIVE message” under DIC Warnings and Messages on page 3-65. 2-39 Turn the knob to the Four-Wheel Drive Low position. You must wait for the Four-Wheel Drive Low indicator light to stop ﬂashing and remain on before shifting your transmission in gear. Notice: Shifting the transmission into gear before the Four-Wheel Drive Low indicator light has stopped ﬂashing could damage the transfer case. To help avoid damaging your vehicle, always wait for the Four-Wheel Drive Low indicator light to stop ﬂashing before shifting the transmission into gear. The vehicle may have signiﬁcant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from NEUTRAL while the engine is running. If the knob is turned to the Four-Wheel Drive Low position when your vehicle is in gear and/or moving, the Four-Wheel Drive Low indicator light will ﬂash for 30 seconds and not complete the shift unless your vehicle is moving less than 3 mph (5 km/h) and the transmission is in NEUTRAL (N). After 30 seconds the transfer case will shift to Four-Wheel Drive High mode. Shifting Into Four-Wheel Drive High or AUTO (Automatic Four-Wheel Drive) Turn the knob to the Four-Wheel High or AUTO position. This can be done at any speed, except when shifting from Four-Wheel Drive Low. The indicator light will ﬂash while shifting. It will remain on when the shift is completed. Shifting Into Two-Wheel Drive High Turn the knob to the Two-Wheel High position. This can be done at any speed, except when shifting from Four-Wheel Drive Low. See shifting out of Four-Wheel Drive Low later in this section for more information. Shifting Into Four-Wheel Drive Low When Four-Wheel Low is engaged, vehicle speed should be kept below 45 mph. Extended high-speed operation in 4L may damage or shorten the life of the drivetrain. To shift to the Four-Wheel Drive Low position, the ignition must be in ON/RUN and the vehicle must be stopped or moving less than 3 mph (5 km/h) with the transmission in NEUTRAL (N). The preferred method for shifting into Four-Wheel Drive Low is to have your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). 2-40 Shifting Out of Four-Wheel Drive Low To shift from Four-Wheel Drive Low to Four-Wheel Drive High, AUTO, or Two-Wheel Drive High, your vehicle must be stopped or moving less than 3 mph (5 km/h) with the transmission in NEUTRAL (N) and the ignition in ON/RUN. The preferred method for shifting out of Four-Wheel Drive Low is to have your vehicle moving 1 to 2 mph (1.6 to 3.2 km/h). Turn the knob to the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High position. You must wait for the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High indicator light to stop ﬂashing and remain on before shifting your transmission into gear. Notice: Shifting the transmission into gear before the Four-Wheel Drive Low indicator light has stopped ﬂashing could damage the transfer case. To help avoid damaging your vehicle, always wait for the Four-Wheel Drive Low indicator light to stop ﬂashing before shifting the transmission into gear. The vehicle may have signiﬁcant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from NEUTRAL while the engine is running. If the knob is turned to the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High switch position when your vehicle is in gear and/or moving, the Four-Wheel Drive High, AUTO or Two-Wheel Drive High indicator light will ﬂash for 30 seconds but will not complete the shift unless your vehicle is moving less than 3 mph (5 km/h) and the transmission is in NEUTRAL (N). Shifting into NEUTRAL To shift the transfer case to NEUTRAL do the following: 1. Make sure the vehicle is parked so that it will not roll. 2. Set the parking brake and apply the regular brake pedal. See Parking Brake on page 2-43 for more information. 3. Start the vehicle or turn the ignition to ON/RUN. 4. Put the transmission in NEUTRAL (N). 5. Shift the transfer case to Two-Wheel Drive High. 6. Turn the transfer case dial clockwise to NEUTRAL till it stops and hold it for 10 seconds. Then slowly release the dial to the four low position. The NEUTRAL light will come on when the transfer case shift to NEUTRAL is complete. 2-41 4. Release the parking brake prior to moving the vehicle. Notice: Shifting the transmission into gear before the Four-Wheel Drive Low indicator light has stopped ﬂashing could damage the transfer case. To help avoid damaging your vehicle, always wait for the Four-Wheel Drive Low indicator light to stop ﬂashing before shifting the transmission into gear. 5. Start the engine and shift the transmission to the desired position. Excessively shifting the transfer case into or out of the different modes may cause the transfer case to enter the shift protection mode. This will protect the transfer case from possible damage and will only allow the transfer case to respond to one shift per 10 seconds. The transfer case may stay in this mode for up to three minutes. 7. If the engine is running, verify that the transfer case is in NEUTRAL (N) by shifting the transmission to REVERSE (R) for one second, then shift the transmission to DRIVE (D) for one second. 8. Turn the ignition to ACC/ACCESSORY, which will turn the engine off. 9. Place the transmission shift lever in PARK (P). 10. Release the parking brake prior to moving the vehicle. 11. Turn the ignition to LOCK/OFF. Shifting Out of NEUTRAL To shift out of NEUTRAL do the following: 1. Set the parking brake and apply the regular brake pedal. 2. Shift the transmission to NEUTRAL (N) and turn the ignition to ON/RUN with the engine off. 3. Turn the transfer case dial to the desired transfer case shift position (Two-Wheel Drive High, Four-Wheel Drive High, AUTO). After the transfer case has shifted out of NEUTRAL the NEUTRAL light will go out. 2-42 Parking Brake To set the parking brake, hold the regular brake pedal down with your right foot. Push down the parking brake pedal with your left foot. A chime sounds and the warning light ﬂashes when the parking brake is applied and the vehicle is moving at least 5 mph (8 km/h). If the ignition is on when the parking brake is released, the brake system warning light goes off. Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving. If you are towing a trailer and are parking on any hill, see Towing a Trailer on page 4-49. To release the parking brake, hold the regular brake pedal down. Then pull the bottom edge of the lever, with the parking brake symbol and located above the parking brake pedal. 2-43 1. Hold the brake pedal down with your right foot and set the parking brake. See Parking Brake on page 2-43 for more information. 2. Move the shift lever into the PARK (P) position by pulling the shift lever toward you and moving it up as far as it will go. 3. Be sure the transfer case is in a drive gear — not in NEUTRAL (N). 4. Turn the ignition key to LOCK/OFF. 5. Remove the key and take it with you. If you can leave your vehicle with the ignition key in your hand, your vehicle is in PARK (P). Shifting Into PARK (P) {CAUTION: It can be dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brake ﬁrmly set. Your vehicle can roll. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when you are on fairly level ground, use the steps that follow. With four-wheel drive, if your transfer case is in NEUTRAL, your vehicle will be free to roll, even if your shift lever is in PARK (P). So, be sure the transfer case is in a drive gear — not in NEUTRAL. If you are pulling a trailer, see Towing a Trailer on page 4-49. 2-44 Leaving Your Vehicle With the Engine Running {CAUTION: It can be dangerous to leave your vehicle with the engine running. Your vehicle could move suddenly if the shift lever is not fully in PARK (P) with the parking brake ﬁrmly set. If you have four-wheel drive and your transfer case is in NEUTRAL, your vehicle will be free to roll, even if your shift lever is in PARK (P). So be sure the transfer case is in a drive gear — not in NEUTRAL. And, if you leave the vehicle with the engine running, it could overheat and even catch ﬁre. You or others could be injured. Do not leave your vehicle with the engine running unless you have to. If you have to leave your vehicle with the engine running, be sure your vehicle is in PARK (P) and the parking brake is ﬁrmly set before you leave it. After you move the shift lever into PARK (P), hold the regular brake pedal down. Then, see if you can move the shift lever away from PARK (P) without ﬁrst pulling it toward you. If you can, it means that the shift lever was not fully locked into PARK (P). Torque Lock If you are parking on a hill and you do not shift your transmission into PARK (P) properly, the weight of the vehicle may put too much force on the parking pawl in the transmission. You may ﬁnd it difficult to pull the shift lever out of PARK (P). This is called torque lock. To prevent torque lock, set the parking brake and then shift into PARK (P) properly before you leave the driver’s seat. To ﬁnd out how, see Shifting Into PARK (P) on page 2-44. When you are ready to drive, move the shift lever out of PARK (P) before you release the parking brake. If torque lock does occur, you may need to have another vehicle push yours a little uphill to take some of the pressure from the parking pawl in the transmission, then you will be able to pull the shift lever out of PARK (P). 2-45 Shifting Out of PARK (P) This vehicle is equipped with an electronic shift lock release system. The shift lock release is designed to: (cid:129) Prevent ignition key removal unless the shift lever is in PARK (P) with the shift lever button fully released, and (cid:129) Prevent movement of the shift lever out of PARK (P), unless the ignition is in ON/RUN or ACC/ACCESSORY and the regular brake pedal is applied. The shift lock release is always functional except in the case of an uncharged or low voltage (less than 9 volt) battery. If your vehicle has an uncharged battery or a battery with low voltage, try charging or jump starting the battery. See Jump Starting on page 5-46 for more information. To shift out of PARK (P) use the following: 1. Apply the brake pedal. 2. Move the shift lever to the desired position. If you still are unable to shift out of PARK (P): 1. Ease the pressure on the shift lever. 2. While holding down the brake pedal, press the shift lever all the way into PARK (P). 3. Move the shift lever to the desired position. If you are still having a problem shifting, then have your vehicle serviced soon. Parking Over Things That Burn {CAUTION: Things that can burn could touch hot exhaust parts under your vehicle and ignite. Do not park over papers, leaves, dry grass, or other things that can burn. 2-46 Engine Exhaust {CAUTION: Engine exhaust can kill. It contains the gas carbon monoxide (CO), which you cannot see or smell. It can cause unconsciousness and death. You might have exhaust coming in if: (cid:129) The exhaust system sounds strange or different. (cid:129) Your vehicle gets rusty underneath. (cid:129) Your vehicle was damaged in a collision. (cid:129) Your vehicle was damaged when driving over high points on the road or over road debris. CAUTION: (Continued) CAUTION: (Continued) (cid:129) Repairs were not done correctly. (cid:129) Your vehicle or the exhaust system has been modiﬁed improperly. If you ever suspect exhaust is coming into your vehicle: (cid:129) Drive it only with all the windows down to blow out any CO; and (cid:129) Have your vehicle ﬁxed immediately. 2-47 Running the Engine While Parked It is better not to park with the engine running. But if you ever have to, here are some things to know. {CAUTION: It can be dangerous to get out of your vehicle if the shift lever is not fully in PARK (P) with the parking brake ﬁrmly set. Your vehicle can roll. Do not leave your vehicle when the engine is running unless you have to. If you have left the engine running, the vehicle can move suddenly. You or others could be injured. To be sure your vehicle will not move, even when you are on fairly level ground, always set the parking brake and move the shift lever to PARK (P). {CAUTION: Idling the engine with the climate control system off could allow dangerous exhaust into your vehicle. See the earlier caution under Engine Exhaust on page 2-47. Also, idling in a closed-in place can let deadly carbon monoxide (CO) into your vehicle even if the climate control fan is at the highest setting. One place this can happen is a garage. Exhaust — with CO — can come in easily. NEVER park in a garage with the engine running. Another closed-in place can be a blizzard. See Winter Driving on page 4-30. 2-48 {CAUTION: Four-wheel drive vehicles with the transfer case in NEUTRAL will allow the vehicle to roll, even if the shift lever is in PARK (P). So, be sure the transfer case is in a drive gear — not in NEUTRAL. Always set the parking brake. Follow the proper steps to be sure your vehicle will not move. See Shifting Into PARK (P) on page 2-44. If you are pulling a trailer, see Towing a Trailer on page 4-49. Mirrors Automatic Dimming Rearview Mirror with OnStar®, Compass and Temperature Display Your vehicle may have this feature. When on, the automatic dimming mirror dims to the proper level to minimize glare from lights behind you after dark. The mirror has a dual display in the upper right corner of the mirror face that shows the compass reading and the outside temperature. Control buttons for the OnStar® system are at the bottom of the mirror. See OnStar® System on page 2-60 for more information about the services OnStar® provides. P(On/Off): This is the on/off button. 2-49 Temperature and Compass Display Press the on/off button, located to the far left, brieﬂy to turn the compass/temperature display on or off. If the display reads CAL, the compass needs to be calibrated. For more information, see “Compass Calibration” following. To adjust between Fahrenheit and Celsius: 1. Press and hold the on/off button for approximately four seconds until either a ﬂashing F or C appears. 2. Press the button again to change the display to the desired unit of measurement. After approximately four seconds of inactivity, the new unit will be locked in and the compass/temperature display will return. If an abnormal temperature reading is displayed for an extended period of time, see your dealer/retailer. Under certain circumstances, a delay in updating the temperature is normal. Automatic Dimming Mirror Operation The automatic dimming mirror comes on each time the ignition is turned to start. To turn the automatic dimming feature off or back on, press the on/off button. The indicator light on the mirror is lit when the automatic dimming feature is on. Compass Calibration The compass may need calibration if one of the following occurs: (cid:129) After approximately ﬁve seconds, the display does not show a compass heading, N for North, for example, there may be a strong magnetic ﬁeld interfering with the compass. Such interference may be caused by a magnetic antenna mount, magnetic note pad holder, or a similar magnetic item. The compass does not display the correct heading and the compass zone variance is set correctly. In order to calibrate, CAL must be displayed in the mirror compass windows. If CAL is not displayed, push the on/off button for approximately 12 seconds or until CAL is displayed. The compass can be calibrated by driving the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction. Compass Variance The mirror is set in zone eight upon leaving the factory. It will be necessary to adjust the compass to compensate for compass variance if the vehicle is outside of zone eight. Under certain circumstances, as during a long distance cross-country trip, it will be necessary to adjust for compass variance. 2-50 (cid:129) Compass variance is the difference between earth’s magnetic north and true geographic north. If not adjusted to account for compass variance, the compass could give false readings. To adjust for compass variance: 1. Find your current location and variance zone number on the following zone map. 3. Keep pressing the on/off button until the desired zone number appears in the display. Release the button. After approximately four seconds of inactivity, the new zone number will be locked in and the compass/temperature display will return. Cleaning the Mirror When cleaning the mirror, use a paper towel or similar material dampened with glass cleaner. Do not spray glass cleaner directly on the mirror as that may cause the liquid cleaner to enter the mirror housing. 2. Press and hold the on/off button until a Z and a zone number appears in the display. The compass is now in zone mode. 2-51 Automatic Dimming Rearview Mirror with Compass and Temperature Display Your vehicle may have this mirror. When on, an automatic dimming mirror will dim to the proper level to minimize glare from lights behind you after dark. The mirror also includes a dual display in the upper right corner of the mirror with the compass reading and the outside temperature. Yb: Brieﬂy press this button to turn the display on or off. Temperature Display The temperature can be displayed by pressing the compass/temperature button. Pressing the compass/ temperature button once brieﬂy, will toggle the display reading on and off. To alternate the temperature reading between Fahrenheit and Celsius, press and hold the compass/temperature button for approximately three seconds until the display blinks F and C. After approximately ﬁve seconds of inactivity, the display will stop blinking and display the last selection made. If an abnormal reading is displayed, see your dealer/retailer. 2-52 Automatic Dimming Mirror Operation O: Press this button to turn the automatic dimming feature on or off. The indicator light to the left of the button will turn on to indicate when the feature is on. Once the mirror is turned off, it will remain off until it is turned back on, or until the vehicle is restarted. Compass Operation Press the compass/temperature button once brieﬂy to turn the display on or off. Compass Calibration The compass may need calibration if one of the following occurs: If CAL is displayed while driving in the vehicle. (cid:129) After approximately ﬁve seconds, the display does not show a compass heading, N for North, for example, there may be a strong magnetic ﬁeld interfering with the compass. Such interference may be caused by a magnetic antenna mount, magnetic note pad holder, or a similar magnetic item. The compass does not display the correct heading and the compass zone variance is set correctly. (cid:129) (cid:129) To adjust for compass variance: 1. Find your current location and variance zone number on the following zone map. In order to calibrate, CAL must be displayed in the mirror compass windows. If CAL is not displayed, push in the compass/temperature button for approximately nine seconds or until CAL is displayed. The compass can be calibrated by driving the vehicle in circles at 5 mph (8 km/h) or less until the display reads a direction. Compass Variance The mirror is set in zone eight upon leaving the factory. It will be necessary to adjust the compass to compensate for compass variance if the vehicle is outside zone eight. Under certain circumstances, as during a long distance cross-country trip, it will be necessary to adjust for compass variance. Compass variance is the difference between earth’s magnetic north and true geographic north. If not adjusted to account for compass variance, your compass could give false readings. 2. Press and hold the compass/temperature button for six seconds until a zone number appears in the display. 3. Press the compass/temperature button on the bottom of the mirror until the new zone number appears in the display. After you stop pressing the button, the display will show a compass direction within a few seconds. 2-53 Cleaning the Mirror Use a paper towel or similar material dampened with glass cleaner. Do not spray glass cleaner directly on the mirror as that may cause the liquid cleaner to enter the mirror housing. Outside Manual Mirrors Adjust your outside mirrors so you can just see the side of your vehicle and have a clear view of objects behind you. The mirrors can be folded in to enter narrow areas. The use of hood-mounted air deﬂectors and add-on convex mirror attachments may adversely affect mirror performance. Outside Trailer-Tow Mirrors If your vehicle has trailer towing type mirrors, they can be adjusted so you can have a clear view of the objects behind you. Manually pull out the mirror head to extend it for better visibility when towing a trailer. These mirrors can be manually folded forward or rearward. The lower portion of the mirror is convex. A convex mirror’s surface is curved so you can see more from the driver’s seat. The convex mirror can be adjusted manually to the driver’s preferred position for better vision. 2-54 Your vehicle may have outside heated mirrors which help clear them of condensation, snow, and ice. When the rear window defogger button is pressed, the heated mirrors are also turned on. Only the upper glass of the mirror is heated. The lower convex part of the mirror is not heated. Your mirror may also have a turn signal arrow that will ﬂash in the direction of the turn or lane change. Outside Power Mirrors If your vehicle is equipped with outside power mirrors, the controls are located on the driver’s door armrest. To adjust each mirror, press one of the four arrows located on the control pad to move the mirror in the direction you want it to go. Adjust each outside mirror so that you can see a little of your vehicle, and the area behind your vehicle. The mirrors may also include a memory function that works with the memory seats. See Memory Seat, Mirrors, and Pedals on page 1-6 for more information. The mirrors can be manually folded inward to prevent damage when going through an automatic car wash. To fold, push the mirror toward the vehicle. To return the mirror to its original position, push outward. Be sure to return both mirrors to their original unfolded position before driving. Press (A) to select the driver’s side mirror or (B) to select the passenger’s side mirror. Press either (A) or (B) again to deselect the mirror. 2-55 Outside Power Foldaway Mirrors If your vehicle is equipped with outside power foldaway mirrors, the controls are located on the driver’s door armrest. (cid:129) Press (A) to select the driver side mirror. Then press the arrows located on the four-way control pad to adjust the mirror. Press (A) again to deselect this mirror. (cid:129) Press (B) to select the passenger side mirror. Then press the arrows located on the four-way control pad to adjust the mirror. Press (B) again to deselect this mirror. (cid:129) Press (C), to fold the mirrors out to the driving position. (cid:129) Press (D) to fold the mirrors in to the folded position. 2-56 If the mirrors are accidentally folded/unfolded manually, they may shake or ﬂutter at normal driving speeds and may not stay in the unfolded position. If this happens, you will need to reset the mirrors. See “Resetting the Power Foldaway Mirrors” next. Resetting the Power Foldaway Mirrors You will need to reset the power foldaway mirrors if the following occurs: The mirrors are accidentally obstructed while folding. They are accidentally manually folded/unfolded. The mirrors will not stay in the unfolded position. The mirrors shake and ﬂutter at normal driving speeds. To reset the power foldaway mirrors, fold and unfold them one time using the mirror controls. This will reset them to their normal position. Turn Signal Indicator Your vehicle may have a turn signal indicator on the mirror. An arrow on the mirror will ﬂash in the direction of the turn or lane change. Ground Illumination Lamps The mirrors may also include ground illumination lamps in the base of the mirror. These lamps help you see the area near the base of the front doors when it is dark out. (cid:129) (cid:129) (cid:129) (cid:129) Outside Automatic Dimming Mirror If your vehicle has this feature, the driver’s outside mirror will adjust for the glare of headlamps behind you. This feature is controlled by the on and off settings found on the electrochromic inside mirror. See Automatic Dimming Rearview Mirror with OnStar®, Compass and Temperature Display on page 2-49 or Automatic Dimming Rearview Mirror with Compass and Temperature Display on page 2-52 for more information. Park Tilt Mirrors If your vehicle has the memory package, the outside mirrors are able to perform the park tilt function. This feature may be useful in allowing the driver to view the curb when parallel parking. This feature will cause the passenger side mirror and/or driver side mirror to tilt to a preselected position when the vehicle is in REVERSE (R). The passenger side mirror and/or the driver side mirror will return to its original position when the vehicle is shifted out of REVERSE (R) or the ignition is turned to off. This feature can be turned on or off through the Driver Information Center (DIC). See DIC Vehicle Customization (With DIC Buttons) on page 3-73 for more information. Outside Convex Mirror {CAUTION: A convex mirror can make things (like other vehicles) look farther away than they really are. If you cut too sharply into the right lane, you could hit a vehicle on your right. Check your inside mirror or glance over your shoulder before changing lanes. The passenger side mirror may have convex glass. A convex mirror’s surface is curved so more can be seen from the driver’s seat. It also makes things like other vehicles, look farther away than they really are. Outside Heated Mirrors The vehicle may have outside heated mirrors which help clear them of condensation, snow, and ice. When the rear window defogger button is pressed, the heated mirrors are also turned on. See “Rear Window Defogger” under Dual Automatic Climate Control System on page 3-26 or Climate Control System on page 3-23 for more information. 2-57 Object Detection Systems Ultrasonic Rear Parking Assist (URPA) If your vehicle has the Ultrasonic Rear Parking Assist (URPA) system, it helps you park easier and avoid other vehicles while in REVERSE (R). It operates at speeds less than 5 mph (8 km/h). It can determine how close objects are to the rear bumper, up to 8 feet (2.5 m) behind your vehicle. The distance sensors are located on the rear bumper. {CAUTION: The Ultrasonic Rear Parking Assist (URPA) system does not replace driver vision. It cannot detect: (cid:129) objects that are below the bumper, underneath the vehicle, or if they are too close or far from the vehicle (cid:129) children, pedestrians, bicyclists, or pets. CAUTION: (Continued) 2-58 CAUTION: (Continued) If you do not use proper care before and while backing; vehicle damage, injury, or death could occur. Even with URPA, always check behind your vehicle before backing up. While backing, be sure to look for objects and check your vehicle’s mirrors. On some vehicles this display is located near the passenger side rear window and can be seen by looking over your right shoulder. If your vehicle has the display, there are three color-coded lights to provide distance and system information. If your vehicle does not have the display and it has URPA, you will hear the beeps as described in the following information. How the System Works URPA comes on automatically when the shift lever is moved into REVERSE (R). The rear display will then brieﬂy illuminate to let you know the system is working. URPA operates only at speeds less than 5 mph (8 km/h). If you are above this speed, the red light on the rear display will ﬂash. To be detected, objects must be at least 10 inches (25.4 cm) off the ground and below liftgate level. Objects must also be within 8 feet (2.5 m) from your rear bumper. This distance may be less during warmer or humid weather. A single beep will sound the ﬁrst time an object is detected between 20 inches (0.5 m) and 8 feet (2.5 m) away. Beeping will occur for three seconds when you are closer than 1 foot (0.3 m) from the object. The following describes what will occur with the URPA display as you get closer to a detected object: Description amber light amber/amber lights amber/amber/red lights amber/amber/red lights ﬂashing and beep for three seconds English 8 ft 40 in 23 in 1 ft Metric 2.5 m 1.0 m 0.6 m 0.3 m The system can be disabled by pressing the rear park aid disable button located next to the radio. The indicator light will come on to indicate that URPA is off. 2-59 When the System Does Not Seem to Work Properly The driver disables the system. The parking brake pedal is depressed. The ultrasonic sensors are not clean. Keep your vehicle’s rear bumper free of mud, dirt, snow, ice and slush. For cleaning instructions, see Washing Your Vehicle on page 5-110. (cid:129) A trailer was attached to your vehicle, or a bicycle or an object was hanging out of your liftgate/liftglass during your last drive cycle, the red light may illuminate in the rear display. Once the attached object is removed, URPA will return to normal operation. (cid:129) A tow bar is attached to your vehicle. The vehicle’s bumper is damaged. Take the vehicle to your dealer/retailer to repair the system. (cid:129) Other conditions may affect system performance, such as vibrations from a jackhammer or the compression of air brakes on a very large truck. If the system is still disabled, after driving forward at least 15 mph (25 km/h), take your vehicle to your dealer/retailer. 2-60 OnStar® System OnStar uses several innovative technologies and live advisors to provide you with a wide range of safety, security, information, and convenience services. If your airbags deploy, the system is designed to make an automatic call to OnStar Emergency advisors who can request emergency services be sent to your location. If you lock your keys in the vehicle, call OnStar at 1-888-4-ONSTAR and they can send a signal to unlock your doors. If you need roadside assistance, press the OnStar button and they can contact Roadside Service for you. OnStar service is provided to you subject to the OnStar Terms and Conditions. You may cancel your OnStar service at any time by contacting OnStar. (cid:129) (cid:129) (cid:129) (cid:129) A complete OnStar Owner’s Guide and the OnStar Terms and Conditions are included in the vehicle’s OnStar Subscriber glove box literature. For more information, visit onstar.com or onstar.ca, contact OnStar at 1-888-4-ONSTAR (1-888-466-7827) or TTY 1-877-248-2080, or press the OnStar button to speak with an OnStar advisor 24 hours a day, 7 days a week. Not all OnStar features are available on all vehicles. To check if your vehicle is equipped to provide the services described below, or for a full description of OnStar services and system limitations, see the OnStar Owner’s Guide in your glove box or visit onstar.com. OnStar Services For new vehicles with OnStar, the Safe & Sound Plan, or the Directions & Connections Plan is included for one year from the date of purchase. You can extend this plan beyond the ﬁrst year, or upgrade to the Directions & Connections Plan. For more information, press the OnStar button to speak with an advisor. Some OnStar services (such as Remote Door Unlock or Stolen Vehicle Location Assistance) may not be available until you register with OnStar. Available Services with Safe & Sound Plan (cid:129) Automatic Notiﬁcation of Airbag Deployment (cid:129) Advanced Automatic Crash Notiﬁcation (AACN) (If equipped) Link to Emergency Services (cid:129) Roadside Assistance (cid:129) Stolen Vehicle Location Assistance (cid:129) AccidentAssist (cid:129) Remote Door Unlock/Vehicle Alert (cid:129) OnStar Vehicle Diagnostics (cid:129) GM Goodwrench® On Demand Diagnostics (cid:129) OnStar Hands-Free Calling with 30 complimentary minutes (cid:129) OnStar Virtual Advisor (U.S. Only) 2-61 (cid:129) Available Services included with Directions & Connections Plan (cid:129) All Safe and Sound Plan Services (cid:129) Driving Directions - Advisor delivered or OnStar Turn-by-Turn Navigation (If equipped) (cid:129) RideAssist Information and Convenience Services OnStar Hands-Free Calling OnStar Hands-Free Calling allows eligible OnStar subscribers to make and receive calls using voice commands. Hands-Free Calling is fully integrated into the vehicle, and can be used with OnStar Pre-Paid Minute Packages. Hands-Free Calling may also be linked to a Verizon Wireless service plan in the U.S. or a Bell Mobility service plan in Canada, depending on eligibility. To ﬁnd out more, refer to the OnStar Owner’s Guide in the vehicle’s glove box, visit www.onstar.com or www.onstar.ca, or speak with an OnStar advisor by pressing the OnStar button or calling 1-888-4-ONSTAR (1-888-466-7827). OnStar Virtual Advisor OnStar Virtual Advisor is a feature of OnStar Hands-Free Calling that uses your minutes to access location-based weather, local traffic reports, and stock quotes. By pressing the phone button and giving a few simple voice commands, you can browse through the various topics. See the OnStar Owner’s Guide for more information (Only available in the continental U.S.). OnStar Steering Wheel Controls Your vehicle may have a Talk/Mute button that can be used to interact with OnStar Hands-Free Calling. See Audio Steering Wheel Controls on page 3-124 for more information. On some vehicles, you may have to hold the button for a few seconds and give the command “ONSTAR” to activate the OnStar Hands-Free Calling. On some vehicles, the mute button can be used to dial numbers into voicemail systems, or to dial phone extensions. See the OnStar Owner’s Guide for more information. 2-62 (cid:129) How OnStar Service Works Your vehicle’s OnStar system has the capability of recording and transmitting vehicle information. This information is automatically sent to an OnStar Call Center at the time of an OnStar button press, Emergency button press or if your airbags or AACN system deploys. The vehicle information usually includes your GPS location and, in the event of a crash, additional information regarding the accident that your vehicle has been involved in (e.g. the direction from which your vehicle was hit). When you use the Virtual Advisor feature of OnStar Hands-Free Calling, your vehicle also sends OnStar your GPS location so that we can provide you with location-based services. OnStar service cannot work unless your vehicle is in a place where OnStar has an agreement with a wireless service provider for service in that area. OnStar service also cannot work unless you are in a place where the wireless service provider OnStar has hired for that area has coverage, network capacity and reception when the service is needed, and technology that is compatible with the OnStar service. Not all services are available everywhere, particularly in remote or enclosed areas, or at all times. Location information about your vehicle is only available if the GPS satellite signals are unobstructed and available. Your vehicle must have a working electrical system (including adequate battery power) for the OnStar equipment to operate. There are other problems OnStar cannot control that may prevent OnStar from providing OnStar service to you at any particular time or place. Some examples are damage to important parts of your vehicle in an accident, hills, tall buildings, tunnels, weather or wireless phone network congestion. Your Responsibility Increase the radio volume if you cannot hear the OnStar advisor. If the light next to the OnStar buttons is red, this means that your system is not functioning properly and should be checked by your dealer/retailer. If the light appears clear (no light is appearing), your OnStar subscription has expired. You can always press the OnStar button to conﬁrm that your OnStar equipment is active. 2-63 Universal Home Remote System The Universal Home Remote System provides a way to replace up to three hand-held Radio-Frequency (RF) transmitters used to activate devices such as garage door openers, security systems, and home lighting. This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: 1. This device may not cause harmful interference. 2. This device must accept any interference received, including interference that may cause undesired operation. This device complies with RSS-210 of Industry Canada. Operation is subject to the following two conditions: 1. This device may not cause interference. 2. This device must accept any interference received, including interference that may cause undesired operation of the device. Changes or modiﬁcations to this system by other than an authorized service facility could void authorization to use this equipment. 2-64 Universal Home Remote System Operation (With Three Round LED) Your vehicle may have the Universal Home Remote System. If there are three round Light Emitting Diode (LED) indicator lights above the Universal Home Remote buttons, follow the instructions below. This system provides a way to replace up to three remote control transmitters used to activate devices such as garage door openers, security systems, and home automation devices. Do not use this system with any garage door opener that does not have the stop and reverse feature. This includes any garage door opener model manufactured before April 1, 1982. Read the instructions completely before attempting to program the transmitter. Because of the steps involved, it may be helpful to have another person available to assist you in programming the transmitter. Be sure to keep the original remote control transmitter for use in other vehicles, as well as, for future programming. You only need the original remote control transmitter for Fixed Code programming. It is also recommended that upon the sale or lease termination of the vehicle, the programmed buttons should be erased for security purposes. See “Erasing Universal Home Remote Buttons” later in this section. When programming a garage door, it is advised to park outside of the garage. Be sure that people and objects are clear of the garage door or security device you are programming. Programming Universal Home Remote — Rolling Code If you have questions or need help programming the Universal Home Remote System, call 1-866-572-2728 or go to www.learcar2u.com. Most garage door openers sold after 1996 are Rolling Code units. Programming a garage door opener involves time-sensitive actions, so read the entire procedure before you begin. If you do not follow these actions, the device will time out and you will have to repeat the procedure. To program up to three devices: 1. From inside the vehicle, press the two outside buttons at the same time for one to two seconds, and immediately release them.

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2008 Chevrolet Tahoe Owners Manual