2000 Chevrolet Tahoe Owners Manual

D Put on extra clothing or wrap a blanket around you.

If you have no blankets or extra clothing, make body insulators from newspapers, burlap bags, rags, floor mats -- anything you can wrap around yourself or tuck under your clothing to keep warm.

If you are stopped by heavy snow, you could be in a serious situation. You should probably stay with your vehicle unless you know for sure that you are near help and you can hike through the snow. Here are some things to do to summon help and keep yourself and your passengers safe: D Turn on your hazard flashers.

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You can run the engine to keep warm, but be careful.

CAUTION:

Snow can trap exhaust gases under your vehicle. This can cause deadly CO (carbon monoxide) gas to get inside. CO could overcome you and kill you. You can’t see it or smell it, so you might not know it is in your vehicle. Clear away snow from around the base of your vehicle, especially any that is blocking your exhaust pipe. And check around again from time to time to be sure snow doesn’t collect there. Open a window just a little on the side of the vehicle that’s away from the wind. This will help keep CO out.

Run your engine only as long as you must. This saves fuel. When you run the engine, make it go a little faster than just idle. That is, push the accelerator slightly. This uses less fuel for the heat that you get and it keeps the battery charged. You will need a well-charged battery to restart the vehicle, and possibly for signaling later on with your headlamps. Let the heater run for a while. Then, shut the engine off and close the window almost all the way to preserve the heat. Start the engine again and repeat this only when you feel really uncomfortable from the cold. But do it as little as possible. Preserve the fuel as long as you can. To help keep warm, you can get out of the vehicle and do some fairly vigorous exercises every half hour or so until help comes.

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Recreational Vehicle Towing There may be times when you want to tow your vehicle behind another vehicle for use at your destination. Be sure to use the proper towing equipment designed for recreational vehicle towing. Follow the instructions for the towing equipment. When towing your vehicle, turn the ignition to OFF. To prevent your battery from draining while towing, remove the IGN 0 fuse from the instrument panel fuse block. Be sure to replace the fuse when you reach your destination. See “Fuses and Circuit Breakers” in the Index.

Two-Wheel-Drive Vehicles Two-wheel-drive vehicles, should not be towed with all four wheels on the ground. Two-wheel-drive transmissions have no provisions for internal lubrication while being towed. To properly tow these vehicles, they should be placed on a platform trailer with all four wheels off the ground. In rare cases when it’s unavoidable that a two-wheel-drive vehicle is to be towed with all four wheels on the ground, the propeller shaft to axle yoke orientation should be marked and the propeller shaft removed following the applicable service manual removal/installation procedure. Dust or dirt can enter the back of the transmission through the opening created by removing the propeller shaft if proper protection is not provided. Also, check the transmission fluid level before driving the truck.

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Four-Wheel-Drive Vehicles

CAUTION:

Shifting the transfer case into NEUTRAL (N) can cause your vehicle to roll even if the transmission is in PARK (P), for an automatic transmission. You or others could be injured. Make sure the parking brake is firmly set before you shift the transfer case into NEUTRAL (N).

D Firmly set the parking brake. D Shift the transmission to PARK (P).

D Securely attach the vehicle being towed to

the tow vehicle.

D Shift the transfer case to NEUTRAL (N). See “Four-Wheel Drive” in the Index for the proper procedure to select the NEUTRAL position for your vehicle.

D Release the parking brake only after the

vehicle being towed is firmly attached to the towing vehicle.

D Turn the ignition to OFF. The OFF position

unlocks the steering column and reduces battery drain as long as the IGN 0 fuse is removed. Unlocking the steering column will allow the proper movement of the front wheels and tires during towing.

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The label shows the size of your original tires and the inflation pressures needed to obtain the gross weight capacity of your vehicle. This is called the GVWR (Gross Vehicle Weight Rating). The GVWR includes the weight of the vehicle, all occupants, fuel and cargo. The Certification/Tire label also tells you the maximum weights for the front and rear axles, called Gross Axle Weight Rating (GAWR). To find out the actual loads on your front and rear axles, you need to go to a weigh station and weigh your vehicle. Your dealer can help you with this. Be sure to spread out your load equally on both sides of the centerline. Never exceed the GVWR for your vehicle, or the GAWR for either the front or rear axle. The Certification/Tire label also contains information about your Front Axle Reserve Capacity. See “Front Axle Reserve Capacity” later in this section. And, if you do have a heavy load, you should spread it out.

Loading Your Vehicle

The Certification/Tire label is found on the rear edge of the driver’s door or in the Incomplete Vehicle Document in the cab.

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NOTICE:

Some vehicles may be equipped with RPO VYU (snow plow prep package). With this option, the payload your vehicle can carry is reduced when a snow plow is installed. Your vehicle can be damaged if either the front or rear axle ratings, or the GVW are exceeded. As a general guideline, with a 650 lb. (295 kg) snow plow, the weight of the occupants and cargo must not exceed 300 lb. (135 kg). However, this may depend on the vehicle’s option content. Therefore, to help avoid vehicle damage: D Make sure the weight on the front and

rear axles does not exceed their respective axle ratings.

NOTICE: (Continued)

NOTICE: (Continued)

D For the front axle, if more cargo or

passengers need to be carried, appropriate counter ballast must be installed rear of the rear axle and properly secured.

D Total vehicle weight must not exceed the

GVW rating.

D See your dealer for advice and information

about using a snow plow on your vehicle.

CAUTION:

Do not load your vehicle any heavier than the GVWR, or either the maximum front or rear GAWR. If you do, parts on your vehicle can break, and it can change the way your vehicle handles. These could cause you to lose control and crash. Also, overloading can shorten the life of your vehicle.

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Your warranty does not cover parts or components that fail because of overloading. The label will help you decide how much cargo and installed equipment your truck can carry. Using heavier suspension components to get added durability might not change your weight ratings. Ask your dealer to help you load your vehicle the right way. If you put things inside your vehicle -- like suitcases, tools, packages, or anything else -- they go as fast as the vehicle goes. If you have to stop or turn quickly, or if there is a crash, they’ll keep going.

CAUTION:

Things you put inside your vehicle can strike and injure people in a sudden stop or turn, or in a crash. D Put things in the cargo area of your vehicle.

Try to spread the weight evenly.

D Never stack heavier things, like suitcases, inside the vehicle so that some of them are above the tops of the seats.

D Don’t leave an unsecured child restraint in

your vehicle.

D When you carry something inside the

vehicle, secure it whenever you can.

D Don’t leave a seat folded down unless you

need to.

There’s also important loading information for off-road driving in this manual. See “Loading Your Vehicle for Off-Road Driving” in the Index.

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Front Axle Reserve Capacity This is the difference between your front GAWR and the front axle weight of your truck with full fuel and passengers. It is the amount of weight you can add to your front axle before reaching your front GAWR.

The front axle reserve capacity for your vehicle can be found in the lower right hand corner of the tire/certification label, as shown in this example.

(W x (A+W.B.)) / W.B.= Weight the accessory is adding to the front axle

In order to calculate the amount of weight any front accessory is adding to the front axle, use the following formula.

Where:

W= Weight of added accessory A= Distance that the accessory is in front of the front axle W.B.= Vehicle Wheelbase

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For example, adding a 700 lb. ( 318 kg) snow plow adds more than 700 lb. ( 318 kg) to the front axle. Using the formula, if the snow plow is 4 ft. (122 cm) in front of the front axle and the wheel base is 10 ft. (305 cm), then: W= 700 lb. ( 318 kg), A= 4 ft. (122 cm) and W.B.= 10 ft. (305 cm) (W x (A+W.B.)) / W.B. = (700 x (4ft. + 10 ft.)) / 10 ft. = 980 lbs. So, if your truck’s front axle reserve capacity is more than 980 lbs. (445 kg), you could add this snow plow without exceeding the front GAWR. You can add heavier equipment on the front of the vehicle if you compensate for it by carrying fewer passengers, less cargo or by positioning cargo more towards the rear. This has the effect of reducing the load on the front. However, the front GAWR, rear GAWR and the GVWR must never be exceeded.

Total Vehicle Reserve Capacity This is the difference between your GVWR and the weight of your truck with full fuel and passengers. It is the amount of weight you can add to your vehicle before reaching your GVWR. The reserve capacity numbers are intended as a guide when selecting the amount of equipment or cargo your truck can carry. If you are unsure of your truck’s front, rear or total weight, go to a weigh station and weigh your vehicle. Your dealer can help you with this. Trailer Recommendations You must subtract your hitch loads from the CWR for your vehicle. Weigh your vehicle with the trailer attached, so that you won’t go over the GVWR or GAWR. If you are using a weight-distributing hitch, weigh the vehicle without the equalizer bars in place. You’ll get the best performance if you spread out the weight of your load the right way, and if you choose the correct hitch and trailer brakes. For more information, see “Trailer Towing” in the Index.

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Towing a Trailer

CAUTION:

If you don’t use the correct equipment and drive properly, you can lose control when you pull a trailer. For example, if the trailer is too heavy, the brakes may not work well -- or even at all. You and your passengers could be seriously injured. Pull a trailer only if you have followed all the steps in this section. Ask your dealer for advice and information about towing a trailer with your vehicle.

NOTICE:

Pulling a trailer improperly can damage your vehicle and result in costly repairs not covered by your warranty. To pull a trailer correctly, follow the advice in this part, and see your dealer for important information about towing a trailer with your vehicle.

To identify what the vehicle trailering capacity is for your vehicle, you should read the information in “Weight of the Trailer” that appears later in this section. If yours was built with trailering options, as many are, it’s ready for heavier trailers. But trailering is different than just driving your vehicle by itself. Trailering means changes in handling, durability and fuel economy. Successful, safe trailering takes correct equipment, and it has to be used properly. That’s the reason for this part. In it are many time-tested, important trailering tips and safety rules. Many of these are important for your safety and that of your passengers. So please read this section carefully before you pull a trailer.

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If You Do Decide To Pull A Trailer If you do, here are some important points: D There are many different laws, including speed limit restrictions, having to do with trailering. Make sure your rig will be legal, not only where you live but also where you’ll be driving. A good source for this information can be state or provincial police.

D Consider using a sway control if your trailer will weigh less than the capacity stamped on your step bumper. You should always use a sway control if your trailer will weigh more than the capacity stamped on your step bumper. You can ask a hitch dealer about sway controls.

D Consider using a sway control. You can ask a

hitch dealer about sway controls.

D Don’t tow a trailer at all during the first 500 miles (800 km) your new vehicle is driven. Your engine, axle or other parts could be damaged.

D Then, during the first 500 miles (800 km) that you

tow a trailer, don’t drive over 50 mph (80 km/h) and don’t make starts at full throttle. This helps your engine and other parts of your vehicle wear in at the heavier loads.

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D You should tow in DRIVE (D). You may want to

shift the transmission to THIRD (3) or, if necessary, a lower gear selection if the transmission shifts too often (e.g., under heavy loads and/or hilly conditions). If you have a manual transmission and you are towing a trailer, it’s better not to use FIFTH (5) gear. Just drive in FOURTH (4) gear (or, as you need to, a lower gear). See “Tow/Haul Mode” in the Index.

Three important considerations have to do with weight: D the weight of the trailer, D the weight of the trailer tongue D and the weight on your vehicle’s tires.

Tow/Haul Mode Tow/haul is a feature that assists when pulling a heavy trailer or a large or heavy load. The purpose of the tow/haul mode is to: D Reduce the frequency and improve the predictability of transmission shifts when pulling a heavy trailer or a large or heavy load.

D Provide the same solid shift feel when pulling a

heavy trailer or a large or heavy load as when the vehicle is unloaded.

D Improve control of vehicle speed while requiring less throttle pedal activity when pulling a heavy trailer or a large or heavy load.

Your vehicle is equipped with a button at the end of the shift lever which, when pressed, enables tow/haul. Your vehicle may be equipped with Autoridet which further improves your vehicle’s ride while towing. See “Autoridet” in the Index for more information. When the button is pressed, a light on the instrument panel will illuminate to indicate that tow/haul has been selected. Tow/haul may be turned off by pressing the button again, at which time the indicator light on the instrument panel will turn off. The vehicle will automatically turn off tow/haul every time it is started. Tow/haul is designed to be most effective when the vehicle and trailer combined weight is at least 75% of the vehicle’s Gross Combined Weight Rating (GCWR). Tow/haul is most useful under the following driving conditions: D When pulling a heavy trailer or a large or heavy load

through rolling terrain.

D When pulling a heavy trailer or a large or heavy load

in stop and go traffic.

D When pulling a heavy trailer or a large or heavy load

in busy parking lots where improved low speed control of the vehicle is desired.

Operating the vehicle in tow/haul when lightly loaded or with no trailer at all will not cause damage. However, there is no benefit to the selection of tow/haul when the vehicle is unloaded.

Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy. Tow/haul is recommended only when pulling a heavy trailer or a large or heavy load. Weight of the Trailer How heavy can a trailer safely be? It depends on how you plan to use your rig. For example, speed, altitude, road grades, outside temperature and how much your vehicle is used to pull a trailer are all important. And, it can also depend on any special equipment that you have on your vehicle. Use one of the following charts to determine how much your vehicle can weigh, based upon your vehicle model and options. Maximum trailer weight is calculated assuming only the driver is in the tow vehicle and it has all the required trailering equipment. The weight of additional optional equipment, passengers and cargo in the tow vehicle must be subtracted from the maximum trailer weight. The engine oil cooler and the heavy-duty trailering package is required on C/K-2500 models with the VORTEC 6000 engine.

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C-1500 (2WD)* Engine (Trans.)

4800 V8

5300 V8

5300 V8
(Suburban/ Yukon XL)

Axle Ratio 3.42
3.73
3.42
3.73
3.73
4.10

Max. Trailer Wt.

6,100 lbs. (2 767 kg) 7,100 lbs. (3 221 kg) 7,100 lbs. (3 221 kg) 8,100 lbs. (3 674 kg) 8,000 lbs. (3 629 kg) 9,000 lbs. (4 082 kg)

K-1500 (4WD)* Engine (Trans.)

4800 V8

5300 V8

5300 V8
(Suburban/ Yukon XL)

Axle Ratio 3.73
4.10
3.73
4.10
3.73
4.10

Max. Trailer Wt.

6,800 lbs. (3 084 kg) 7,800 lbs. (3 538 kg) 7,800 lbs. (3 538 kg) 8,800 lbs. (3 992 kg) 7,800 lbs. (3 538 kg) 8,800 lbs. (3 992 kg)

* Weight-distributing hitch tongue weight 10% to 15% of hitch pulling weight 1,200 lbs. (544 kg) maximum.

* Weight-distributing hitch tongue weight 10% to 15% of hitch pulling weight 1,200 lbs. (544 kg) maximum.

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C-2500 LD (2WD)* Engine (Trans.)

6000 V8
(Suburban/ Yukon XL)

Axle Ratio 3.73
4.10

Max. Trailer Wt.

8,500 lbs. (3 856 kg) 10,500 lbs. (4 763 kg)

K-2500 HD (4WD)* Engine (Trans.)

6000 V8
(Suburban/ Yukon XL)

Axle Ratio 3.73
4.10

Max. Trailer Wt.

8,100 lbs. (3 674 kg) 10,100 lbs. (4 581 kg)

* Weight-distributing hitch tongue weight 10% to 15% of hitch pulling weight 1,200 lbs. (544 kg) maximum.

* Weight-distributing hitch tongue weight 10% to 15% of hitch pulling weight 1,200 lbs. (544 kg) maximum.

You can ask your dealer for our trailering information or advice, or you can write us at the address listed in your Warranty and Owner Assistance Information Booklet. In Canada, write to:

General Motors of Canada Limited Customer Communication Centre 1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7

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Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total or gross weight of your vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo you may carry in it, and the people who will be riding in the vehicle. And if you will tow a trailer, you must add the tongue load to the GVW because your vehicle will be carrying that weight, too. See “Loading Your Vehicle” in the Index for more information about your vehicle’s maximum load capacity.

If you’re using a weight-carrying or a weight-distributing hitch, the trailer tongue weight (A) should be 10 percent to 15 percent of the total loaded trailer weight (B). Do not exceed the maximum allowable tongue weight for your vehicle. After you’ve loaded your trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they aren’t, you may be able to get them right simply by moving some items around in the trailer. Total Weight on Your Vehicle’s Tires Be sure your vehicle’s tires are inflated to the upper limit for cold tires. You’ll find these numbers on the Certification label at the rear edge of the driver’s door or see “Tire Loading” in the Index. Then be sure you don’t go over the GVW limit for your vehicle, including the weight of the trailer tongue.

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Hitches It’s important to have the correct hitch equipment. Crosswinds, large trucks going by and rough roads are a few reasons why you’ll need the right hitch. Here are some rules to follow: D If you use a step-bumper hitch, your bumper could

be damaged in sharp turns. Make sure you have ample room when turning to avoid contact between the trailer and the bumper.

D If you’ll be pulling a trailer that, when loaded, will

weigh more than the capacity stamped on your step bumper, be sure to use a properly mounted, weight-distributing hitch and sway control of the proper size. This equipment is very important for proper vehicle loading and good handling when you’re driving.

Safety Chains You should always attach chains between your vehicle and your trailer. Cross the safety chains under the tongue of the trailer to help prevent the tongue from contacting the road if it becomes separated from the hitch. Instructions about safety chains may be provided by the hitch manufacturer or by the trailer manufacturer. For trailers up to 5,000 lbs. (2 270 kg) you may attach the safety chains to the attaching points on the bumper. For heavier trailers, follow the trailer or hitch manufacturer’s recommendation for attaching safety chains. If you have the factory-installed trailering package, for vehicles equipped to pull a trailer up to 10,500 lbs. (4 763 kg), you may attach the safety chains to the attaching point on the hitch platform. Always leave just enough slack so you can turn with your rig. Never allow safety chains to drag on the ground.

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Trailer Brakes If your trailer weighs more than 2,000 lbs. (900 kg) loaded, then it needs its own brakes -- and they must be adequate. Be sure to read and follow the instructions for the trailer brakes so you’ll be able to install, adjust and maintain them properly. Your trailer brake system can tap into the vehicle’s hydraulic brake system only if: D The trailer parts can withstand 3,000 psi

(20 650 kPa) of pressure.

D The trailer’s brake system will use less than 0.02 cubic inches (0.3 cc) of fluid from your vehicle’s master cylinder. Otherwise, both braking systems won’t work well. You could even lose your brakes.

If everything checks out this far, make the brake tap at the port on the master cylinder that sends the fluid to the rear brakes. But don’t use copper tubing for this. If you do, it will bend and finally break off. Use steel brake tubing.

Driving with a Trailer

CAUTION:

If you have a rear-most window open and you pull a trailer with your vehicle, carbon monoxide (CO) could come into your vehicle. You can’t see or smell CO. It can cause unconsciousness or death. (See “Engine Exhaust” in the Index.) To maximize your safety when towing a trailer: D Have your exhaust system inspected for leaks, and make necessary repairs before starting on your trip.

D Keep the rear-most windows closed. D If exhaust does come into your vehicle

through a window in the rear or another opening, drive with your front, main heating or cooling system on and with the fan on any speed. This will bring fresh, outside air into your vehicle. Do not use MAX A/C because it only recirculates the air inside your vehicle. (See “Comfort Controls” in the Index.)

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Towing a trailer requires a certain amount of experience. Before setting out for the open road, you’ll want to get to know your rig. Acquaint yourself with the feel of handling and braking with the added weight of the trailer. And always keep in mind that the vehicle you are driving is now a good deal longer and not nearly as responsive as your vehicle is by itself. Before you start, check the trailer hitch and platform (and attachments), safety chains, electrical connector, lamps, tires and mirror adjustment. If the trailer has electric brakes, start your vehicle and trailer moving and then apply the trailer brake controller by hand to be sure the brakes are working. This lets you check your electrical connection at the same time. During your trip, check occasionally to be sure that the load is secure, and that the lamps and any trailer brakes are still working.

Following Distance Stay at least twice as far behind the vehicle ahead as you would when driving your vehicle without a trailer. This can help you avoid situations that require heavy braking and sudden turns. Passing You’ll need more passing distance up ahead when you’re towing a trailer. And, because you’re a good deal longer, you’ll need to go much farther beyond the passed vehicle before you can return to your lane. Backing Up Hold the bottom of the steering wheel with one hand. Then, to move the trailer to the left, just move that hand to the left. To move the trailer to the right, move your hand to the right. Always back up slowly and, if possible, have someone guide you.

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Making Turns

NOTICE:

Making very sharp turns while trailering could cause the trailer to come in contact with the vehicle. Your vehicle could be damaged. Avoid making very sharp turns while trailering.

When you’re turning with a trailer, make wider turns than normal. Do this so your trailer won’t strike soft shoulders, curbs, road signs, trees or other objects. Avoid jerky or sudden maneuvers. Signal well in advance. Turn Signals When Towing a Trailer The arrows on your instrument panel will flash whenever you signal a turn or lane change. Properly hooked up, the trailer lamps will also flash, telling other drivers you’re about to turn, change lanes or stop. When towing a trailer, the arrows on your instrument panel will flash for turns even if the bulbs on the trailer are burned out. Thus, you may think drivers behind you are seeing your signal when they are not. It’s important to check occasionally to be sure the trailer bulbs are still working.

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Driving On Grades Reduce speed and shift to a lower gear before you start down a long or steep downgrade. If you don’t shift down, you might have to use your brakes so much that they would get hot and no longer work well. You can tow in DRIVE (D). You may want to shift the transmission to THIRD (3) or, if necessary, a lower gear selection if the transmission shifts too often (e.g., under heavy loads and/or hilly conditions). You may also want to activate the tow/haul mode if the transmission shifts too often. See “Tow/Haul Mode” in the Index. When towing at high altitude on steep uphill grades, consider the following: Engine coolant will boil at a lower temperature than at normal altitudes. If you turn your engine off immediately after towing at high altitude on steep uphill grades, your vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked (preferably on level ground) with the automatic transmission in PARK (P) for a few minutes before turning the engine off. If you do get the overheat warning, see “Engine Overheating” in the Index.

Parking on Hills

CAUTION:

You really should not park your vehicle, with a trailer attached, on a hill. If something goes wrong, your rig could start to move. People can be injured, and both your vehicle and the trailer can be damaged.

But if you ever have to park your rig on a hill, here’s how to do it: 1. Apply your regular brake, but don’t shift into

PARK (P) yet.

2. Have someone place chocks under the trailer wheels. 3. When the wheel chocks are in place, release the regular brakes until the chocks absorb the load.

4. Reapply the regular brakes. Then apply your parking

brake and shift into PARK (P).

5.

If you have a four-wheel-drive vehicle, be sure the transfer case is in a drive gear and not in NEUTRAL (N).

6. Release the regular brakes.

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 won’t move, even when you’re on fairly level ground, use the steps that follow. Always put the shift lever fully in PARK (P) with the parking brake firmly set. If the transfer case on four-wheel drive vehicles is in NEUTRAL (N), 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 (N).

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When You Are Ready to Leave After Parking on a Hill 1. Apply your regular brakes and hold the pedal down

while you: D Start your engine; D Shift into a gear; and D Release the parking brake.

2. Let up on the brake pedal. 3. Drive slowly until the trailer is clear of the chocks. 4. Stop and have someone pick up and store the chocks. Maintenance When Trailer Towing Your vehicle will need service more often when you’re pulling a trailer. See the Maintenance Schedule for more on this. Things that are especially important in trailer operation are automatic transmission fluid (don’t overfill), engine oil, axle lubricant, belt, cooling system and brake system. Each of these is covered in this manual, and the Index will help you find them quickly. If you’re trailering, it’s a good idea to review these sections before you start your trip. Check periodically to see that all hitch nuts and bolts are tight.

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Trailer Wiring Harness Your vehicle is equipped with the following wiring harnesses for towing a trailer.

Basic Trailer Wiring Package

The trailer wiring harness with a seven-pin connector located at the rear of the vehicle and are tied to the vehicle’s frame. The harness connector can be plugged into a seven-pin universal heavy-duty trailer connector available through your dealer.

The seven-wire harness contains the following trailer circuits: D Yellow: Left Stop/Turn Signal D Dark Green: Right Stop/Turn Signal D Brown: Taillamps D White: Ground D Light Green: Back-up Lamps D Red: Battery Feed D Dark Blue: Trailer Brake If you need to upgrade your vehicle to heavy-duty trailering, a brake controller harness is available from your dealer.

Heavy-Duty Trailer Wiring Package (If Equipped)

Your vehicle is equipped with the seven-wire trailer towing harness. This harness with a seven-pin universal heavy-duty trailer connector that is attached to a bracket on the hitch platform (if equipped).

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Instrument Panel Jumper Wiring Harness

This harness is included with the heavy-duty trailer wiring package. The harness is for an electric trailer brake controller and includes a trailer battery feed fuse. This harness and fuse should be installed by your dealer or a qualified service center.

The seven-wire harness contains the following trailer circuits: D Yellow: Left Stop/Turn Signal D Dark Green: Right Stop/Turn Signal D Brown: Taillamps D White: Ground D Light Green: Back-up Lamps D Red: Battery Feed D Dark Blue: Trailer Brake A jumper harness for an electric trailer brake controller and a trailer battery feed fuse are included with this trailering package. (See “Instrument Panel Jumper Wiring Harness” later in this section.) If you need to tow a light-duty trailer with a standard four-way round pin connector, an adapter connector is available from your dealer.

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Power Winches If you wish to use a power winch on your vehicle, only use it when your vehicle is stationary or anchored.

Step-Bumper Pad If your vehicle has a rear step bumper, it may be equipped with a rear step pad at the center of the bumper.

NOTICE:

Using a power winch with the transmission in gear may damage the transmission. When operating a power winch, always leave the transmission in NEUTRAL (N).

Use the regular brakes, set the parking brake, or block the wheels to keep your vehicle from rolling.

If you will be using the bumper to tow a trailer, you must remove the center cutout circle to install the trailer ball.

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Section 5 Problems on the Road

Here you’ll find what to do about some problems that can occur on the road.

5-2
5-2
5-3
5-8
5-9

Hazard Warning Flashers Other Warning Devices Jump Starting Towing Your Vehicle Engine Overheating

5-12
5-18
5-18
5-19
5-31

Cooling System Engine Fan Noise If a Tire Goes Flat Changing a Flat Tire If You’re Stuck: In Sand, Mud, Ice or Snow

5-

5-1

Hazard Warning Flashers

Press the button at the top of the steering column all the way down to make your front and rear turn signal lamps flash on and off.

Your hazard warning flashers work no matter what position your key is in, and even if the key isn’t in. To turn off the flashers, press the button until the first click and release. When the hazard warning flashers are on, your turn signals won’t work. Other Warning Devices If you carry reflective triangles, you can use them to warn others. Set one up at the side of the road about 300 feet (100 m) behind your vehicle.

Your hazard warning flashers let you warn others. They also let police know you have a problem. Your front and rear turn signal lamps will flash on and off. But they won’t flash if you’re braking.

5-2

Jump Starting If your battery has run down, you may want to use another vehicle and some jumper cables to start your vehicle. But please use the following steps to do it safely.

CAUTION:

Batteries can hurt you. They can be dangerous because: D They contain acid that can burn you. D They contain gas that can explode or ignite. D They contain enough electricity to burn you. If you don’t follow these steps exactly, some or all of these things can hurt you.

NOTICE:

Ignoring these steps could result in costly damage to your vehicle that wouldn’t be covered by your warranty. The ACDelcoR battery in your vehicle has a built-in hydrometer. Do not charge, test or jump start the battery if the hydrometer looks clear or light yellow. Replace the battery when there is a clear or light yellow hydrometer and a cranking complaint. Trying to start your vehicle by pushing or pulling it won’t work, and it could damage your vehicle.

5-3

1. Check the other vehicle. It must have a 12-volt

battery with a negative ground system.

NOTICE:

If the other system isn’t a 12-volt system with a negative ground, both vehicles can be damaged.

2. Get the vehicles close enough so the jumper cables can reach, but be sure the vehicles aren’t touching each other. If they are, it could cause a ground connection you don’t want. You wouldn’t be able to start your vehicle, and the bad grounding could damage the electrical systems. To avoid the possibility of the vehicles rolling, set the parking brake firmly on both vehicles involved in the jump start procedure. Put the transmission in PARK (P). If you have a four-wheel-drive vehicle, be sure the transfer case is not in NEUTRAL (N).

3. Turn off the ignition on both vehicles. Unplug

unnecessary accessories plugged into the cigarette lighter or accessory power outlets. Turn off all lamps that aren’t needed as well as radios. This will avoid sparks and help save both batteries. In addition, it could save your radio!

NOTICE:

If you leave your radio on, it could be badly damaged. The repairs wouldn’t be covered by your warranty.

CAUTION:

An electric fan can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

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4. Open the hoods and locate the positive (+) and

negative (-) terminal locations on the other vehicle. Your vehicle has a remote positive (+) jump starting terminal and a remote negative (-) jump starting terminal. The remote positive (+) terminal is located behind a red plastic cover near the driver’s side of the engine accessory drive bracket. To uncover the remote positive (+) terminal, open the red plastic cover. The remote negative (-) terminal is located on the engine accessory drive bracket. This is marked “GND” on V8 engines. You should always use the remote positive (+) and the remote negative (-) terminals instead of the positive (+) and negative (-) terminals on your battery.

CAUTION:

If your vehicle has air conditioning, the auxiliary electric fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

CAUTION:

Using a match near a battery can cause battery gas to explode. People have been hurt doing this, and some have been blinded. Use a flashlight if you need more light. Be sure the battery has enough water. You don’t need to add water to the ACDelcoR battery installed in every new GM vehicle. But if a battery has filler caps, be sure the right amount of fluid is there. If it is low, add water to take care of that first. If you don’t, explosive gas could be present. Battery fluid contains acid that can burn you. Don’t get it on you. If you accidentally get it in your eyes or on your skin, flush the place with water and get medical help immediately.

5-5

5. Check that the jumper cables don’t have loose or

missing insulation. If they do, you could get a shock. The vehicles could be damaged too. Before you connect the cables, here are some basic things you should know. Positive (+) will go to positive (+) or a remote positive terminal if the vehicle has one. Negative (-) will go to a heavy-unpainted metal engine part or a remote negative terminal if the vehicle has one. Don’t connect positive (+) to negative (-) or you’ll get a short that would damage the battery and maybe other parts too.

CAUTION:

Fans or other moving engine parts can injure you badly. Keep your hands away from moving parts once the engine is running.

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6. Connect the red

positive (+) cable to the positive (+) terminal of the vehicle with the dead battery. Use a remote positive (+) terminal if the vehicle has one.

7. Don’t let the other end touch metal. Connect it to the positive (+) terminal of the good battery. Use a remote positive (+) terminal if the vehicle has one.

8. Now connect the black

negative (-) cable to the good battery’s negative (-) cable. Use a remote negative (-) terminal if the vehicle has one.

9. When connecting the cable, be sure it is not near any engine parts that will move.

Don’t let the other end touch anything until the next step. The other end of the negative (-) cable doesn’t go to the dead battery. It goes to a heavy unpainted metal part of the vehicle with the dead battery or to a remote negative (-) terminal if the vehicle has one.

10. Now start the vehicle with the good battery and

run the engine for awhile.

11. Try to start the vehicle with the dead battery. If it won’t start after a few tries, it probably needs service.

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12. Remove the cables in reverse order to prevent

electrical shorting. Take care that they don’t touch each other or any other metal.

Towing Your Vehicle

CAUTION:

To help avoid serious personal injury to you or others: D Never let passengers ride in a vehicle that

is being towed.

D Never tow faster than safe or posted speeds. D Never tow with damaged parts not fully secured. D Never get under your vehicle after it has

been lifted by the tow truck.

D Always secure the vehicle on each side with

separate safety chains when towing it.

D Use only the correct hooks.

NOTICE:

Use the proper towing equipment to avoid damage to the bumper, fascia or fog lamp areas of the vehicle.

A. Heavy Unpainted Metal Engine Part B. Good Battery C. Dead Battery

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With current trends in automotive styles and design, it is essential that the correct towing equipment is used to tow a vehicle. Your vehicle can be towed with wheel-lift equipment or car carrier equipment. Two-Wheel-Drive vehicle towing limits for wheel lift equipment are as follows: D Front Towing -- 35 mph (55 km/h) for 50 miles (80 km) D Rear Towing -- 55 mph (88 km/h) or legal speed

limit and the distance is unlimited.

Four-Wheel-Drive vehicles must have the transfer case in NEUTRAL (N). See “Four-Wheel Drive” in the Index for the proper procedure to select the NEUTRAL position for your vehicle. The towing limits for four-wheel-drive vehicles with wheel-lift equipment are as follows: D Front Towing -- 55 mph (88 km/h) or legal speed

limit and distance is unlimited

D Rear Towing -- 55 mph (88 km/h) for 50 miles (80 km). You cannot tow your vehicle using sling-type equipment. Consult your dealer or a professional towing service if you need to have your vehicle towed. See “Roadside Assistance” in the Index.

Engine Overheating You will find a coolant temperature gage on your vehicle’s instrument panel. See “Engine Coolant Temperature Gage” in the Index. In addition, you will find a LOW COOLANT, CHECK COOLANT TEMP, ENGINE OVERHEATED and a REDUCED ENGINE POWER message in the message center on the instrument panel. See “Message Center” in the Index. Overheated Engine Protection Operating Mode (V8 Engines Only) Should an overheated engine condition exist and the REDUCED ENGINE POWER message is displayed, an overheat protection mode which alternates firing groups of cylinders helps prevent engine damage. In this mode, you will notice a loss in power and engine performance. This operating mode allows your vehicle to be driven to a safe place in an emergency. Towing a trailer in the overheat protection mode should be avoided.

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NOTICE:

CAUTION:

After driving in the overheated engine protection operating mode, to avoid engine damage, allow the engine to cool before attempting any repair. The engine oil will be severely degraded. Repair the cause of coolant loss, change the oil and reset the oil life monitor. See “Engine Oil” in the Index.

If Steam Is Coming From Your Engine

Steam from an overheated engine can burn you badly, even if you just open the hood. Stay away from the engine if you see or hear steam coming from it. Just turn it off and get everyone away from the vehicle until it cools down. Wait until there is no sign of steam or coolant before you open the hood. If you keep driving when your engine is overheated, the liquids in it can catch fire. You or others could be badly burned. Stop your engine if it overheats, and get out of the vehicle until the engine is cool. See “Overheated Engine Protection Operating Mode” in the Index.

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NOTICE:

If your engine catches fire because you keep driving with no coolant, your vehicle can be badly damaged. The costly repairs would not be covered by your warranty. See “Overheated Engine Protection Operating Mode” in the Index.

If No Steam Is Coming From Your Engine If you get an engine overheat warning but see or hear no steam, the problem may not be too serious. Sometimes the engine can get a little too hot when you: D Climb a long hill on a hot day. D Stop after high-speed driving. D Idle for long periods in traffic. D Tow a trailer. See “Driving on Grades” in the Index. If you get the overheat warning with no sign of steam, try this for a minute or so: 1. If your air conditioner is on, turn it off. 2. If you have an air conditioner and it’s on, turn it off.

3. Turn on your heater to full hot at the highest fan

speed and open the window as necessary.

4. If you’re in a traffic jam, shift to NEUTRAL (N);

otherwise, shift to the highest gear while driving -- DRIVE (D).

If you no longer have the overheat warning, you can drive. Just to be safe, drive slower for about 10 minutes. If the warning doesn’t come back on, you can drive normally. If the warning continues, pull over, stop, and park your vehicle right away. If there’s still no sign of steam, push down the accelerator until the engine speed is about twice as fast as normal idle speed for at least three minutes while you’re parked. If you still have the warning, turn off the engine and get everyone out of the vehicle until it cools down. Also, see “Overheated Engine Protection Operating Mode” listed previously in this section. You may decide not to lift the hood but to get service help right away.

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Cooling System When you decide it’s safe to lift the hood, here’s what you’ll see:

CAUTION:

If your vehicle has air conditioning, the auxiliary electric engine cooling fan under the hood can start up even when the engine is not running and can injure you. Keep hands, clothing and tools away from any underhood electric fan.

If the coolant inside the coolant recovery tank surge tank tank is boiling, don’t do anything else until it cools down.

When the engine is cold, the coolant level should be at or above the FILL COLD mark.

A. Coolant Surge Tank B. Coolant Surge Tank Pressure Cap C. Engine Fan

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If it isn’t, you may have a leak in the radiator hoses, heater hoses, radiator, water pump or somewhere else in the cooling system.

NOTICE:

CAUTION:

Heater and radiator hoses, and other engine parts, can be very hot. Don’t touch them. If you do, you can be burned. Don’t run the engine if there is a leak. If you run the engine, it could lose all coolant. That could cause an engine fire, and you could be burned. Get any leak fixed before you drive the vehicle.

NOTICE:

Engine damage from running your engine without coolant isn’t covered by your warranty. See “Overheated Engine Protection Operating Mode” in the Index.

When adding coolant, it is important that you use only DEX-COOLR (silicate-free) coolant. If coolant other than DEX-COOL is added to the system, premature engine, heater core or radiator corrosion may result. In addition, the engine coolant will require change sooner -- at 30,000 miles (50 000 km) or 24 months, whichever occurs first. Damage caused by the use of coolant other than DEX-COOLR is not covered by your new vehicle warranty.

If there seems to be no leak, start the engine again. See if the engine cooling fan speed increases when idle speed is doubled by pushing the accelerator pedal down. If it doesn’t, your vehicle needs service. Turn off the engine.

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How to Add Coolant to the Coolant Surge Tank If you haven’t found a problem yet, but the coolant level isn’t at or above the FILL COLD mark, add a 50/50
mixture of clean, drinkable water and DEX-COOLR coolant at the coolant surge tank, but be sure the cooling system, including the coolant surge tank pressure cap, is cool before you do it. (See “Engine Coolant” in the Index for more information.)

CAUTION:

Steam and scalding liquids from a hot cooling system can blow out and burn you badly. They are under pressure, and if you turn the coolant surge tank pressure cap -- even a little -- they can come out at high speed. Never turn the cap when the cooling system, including the coolant surge tank pressure cap, is hot. Wait for the cooling system and coolant surge tank pressure cap to cool if you ever have to turn the pressure cap.

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CAUTION:

NOTICE:

Adding only plain water to your cooling system can be dangerous. Plain water, or some other liquid like alcohol, can boil before the proper coolant mixture will. Your vehicle’s coolant warning system is set for the proper coolant mixture. With plain water or the wrong mixture, your engine could get too hot but you wouldn’t get the overheat warning. Your engine could catch fire and you or others could be burned. Use a 50/50 mixture of clean, drinkable water and DEX-COOLR coolant.

In cold weather, water can freeze and crack the engine, radiator, heater core and other parts. So use the recommended coolant.

CAUTION:

You can be burned if you spill coolant on hot engine parts. Coolant contains ethylene glycol and it will burn if the engine parts are hot enough. Don’t spill coolant on a hot engine.

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3. Then fill the coolant surge tank with the proper

mixture, to the FILL COLD mark.

1. You can remove the coolant surge tank pressure

cap when the cooling system, including the coolant surge tank pressure cap and upper radiator hose, is no longer hot. Turn the pressure cap slowly counterclockwise (left) about one full turn. If you hear a hiss, wait for that to stop. A hiss means there is still some pressure left.

2. Then keep turning the pressure cap slowly, and

remove it.

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4. With the coolant surge tank pressure cap off, start

the engine and let it run until you can feel the upper radiator hose getting hot. Watch out for the engine cooling fan. By this time, the coolant level inside the coolant surge tank may be lower. If the level is lower, add more of the proper mixture to the coolant surge tank until the level reaches the FILL COLD mark.

5. Then replace the pressure cap. Be sure the pressure

cap is hand-tight.

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Engine Fan Noise Your vehicle has a clutched engine cooling fan. When the clutch is engaged, the fan spins faster to provide more air to cool the engine. In most everyday driving conditions, the fan is spinning slower and the clutch is not fully engaged. This improves fuel economy and reduces fan noise. Under heavy vehicle loading, trailer towing and/or high outside temperatures, the fan speed increases as the clutch more fully engages. So you may hear an increase in fan noise. This is normal and should not be mistaken as the transmission slipping or making extra shifts. It is merely the cooling system functioning properly. The fan will slow down when additional cooling is not required and the clutch disengages. You may also hear this fan noise when you start the engine. It will go away as the fan clutch partially disengages.

If a Tire Goes Flat It’s unusual for a tire to “blow out” while you’re driving, especially if you maintain your tires properly. If air goes out of a tire, it’s much more likely to leak out slowly. But if you should ever have a “blowout,” here are a few tips about what to expect and what to do: If a front tire fails, the flat tire will create a drag that pulls the vehicle toward that side. Take your foot off the accelerator pedal and grip the steering wheel firmly. Steer to maintain lane position, and then gently brake to a stop well out of the traffic lane. A rear blowout, particularly on a curve, acts much like a skid and may require the same correction you’d use in a skid. In any rear blowout, remove your foot from the accelerator pedal. Get the vehicle under control by steering the way you want the vehicle to go. It may be very bumpy and noisy, but you can still steer. Gently brake to a stop -- well off the road if possible. If a tire goes flat, the next part shows how to use your jacking equipment to change a flat tire safely.

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Changing a Flat Tire If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your hazard warning flashers.

CAUTION:

Changing a tire can cause an injury. The vehicle can slip off the jack and roll over you or other people. You and they could be badly injured. Find a level place to change your tire. To help prevent the vehicle from moving: 1. Set the parking brake firmly. 2. Put an automatic transmission shift lever

in PARK (P) or shift a manual transmission to FIRST (1) or REVERSE (R).

3. Turn off the engine. 4. Put the wheel blocks at the front and rear

of the tire farthest away from the one being changed. That would be the tire on the other side of the vehicle, at the opposite end.

The following steps will tell you how to use the jack and change a tire.

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Removing the Spare Tire and Tools The equipment you’ll need is under the storage tray in the left trim panel for Suburban/Yukon XL Models. For Utility Models, the equipment is located under the rear seat behind the driver’s seat and behind the left trim panel in the rear of the vehicle. Skip the first step and follow the last three. 1. Remove the tray to access the tools. 2. There is a wing nut used to retain the tool kit.

To remove it, turn the wing nut counterclockwise. 3. To release the bottle jack from it’s holder, turn the knob on the bottle jack counterclockwise to lower the jack head.

4. The wheel blocks and the wheel block retainer can be

removed by turning the wing nut counterclockwise.

You’ll use the jack handle extensions and the wheel wrench to remove the underbody-mounted spare tire.

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A. Hoist Assembly B. Wheel Wrench C. Jack Handle Extensions D. Hoist Shaft E. Valve Stem, Pointed Up F. Spare Tire

G. Tire Retainer H. Hoist Cable I. Hoist Lock J. Hoist Shaft Access Hole K. Hoist End of

Extension Tool

Follow these instructions to lower the spare tire: 1. If the vehicle is equipped with a hoist lock, open

the spare tire lock cover on the bumper and use the ignition key to remove the lock.

2. Assemble the wheel wrench and the two jack handle extensions as shown. Insert the hoist end (open end) of the extension through the hole in the rear bumper. Be sure the hoist end of the extension connects into the hoist shaft (the ribbed square end of the extension is used to lower the spare tire).

3. Turn the wheel wrench counterclockwise to lower

the spare tire to the ground. Continue to turn the wheel wrench until the spare tire can be pulled out from under the vehicle. The wheel wrench has a hook that allows you to pull the hoist cable towards you, to assist in reaching the spare tire.

4. When the tire has been lowered, tilt the retainer at the end of the cable so it can be pulled up through the wheel opening.

5. Put the spare tire near the flat tire.

The tools you’ll be using include the bottle jack (A), the wheel blocks (B), the jack handle (C), the jack handle extensions (D), and the wheel wrench (E). If the flat tire is on the rear of the vehicle, you’ll need to use both jack handle extensions.

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Attach the wheel wrench to the jack handle extensions (as needed). Attach the jack handle to the jack.

Turn the wheel wrench clockwise to raise the jack lift head to the lifting point.

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If your vehicle has wheel nut caps, loosen them by turning the wheel wrench counterclockwise. If you have a center cap with wheel nut caps, the wheel nut caps are designed to remain with the center cap. Remove the center cap.

Removing the Flat Tire and Installing the Spare Tire

1. Use the wheel wrench

to loosen all the wheel nuts. Turn the wheel wrench counterclockwise to loosen the wheel nuts. Don’t remove the wheel nuts yet.

If the wheel has a smooth center piece, place the chisel end of the wheel wrench in the slot on the wheel and gently pry out.

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CAUTION:

Getting under a vehicle when it is jacked up is dangerous. If the vehicle slips off the jack, you could be badly injured or killed. Never get under a vehicle when it is supported only by a jack.

CAUTION:

Raising your vehicle with the jack improperly positioned can damage the vehicle and even make the vehicle fall. To help avoid personal injury and vehicle damage, be sure to fit the jack lift head into the proper location before raising the vehicle.

Position the jack under the vehicle. If the flat tire is on the front of the vehicle, position the jack on the frame behind the flat tire where the frame sections overlap. On all 1500 Series vehicles, use the jacking pad provided on the rear axle. On 2500 Series vehicles, use the axle between the spring and shock. If you have added a snow plow to the front of your vehicle, lower the snow plow fully before raising the vehicle.

5-24

Front Position

Rear Position 1500 Series

Rear Position 2500 Series

2. Make sure the jack head is positioned so that the rear axle is resting securely between the grooves that are on the jack head. Turn the wheel wrench clockwise to raise the vehicle. Raise the vehicle far enough off the ground so there is enough room for the spare tire to fit back underneath the rear of the vehicle.

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3. Remove all the wheel nuts and take off the flat tire.

CAUTION:

4. Remove any rust or dirt

from the wheel bolts, mounting surfaces and spare wheel.

Rust or dirt on the wheel, or on the parts to which it is fastened, can make the wheel nuts become loose after a time. The wheel could come off and cause an accident. When you change a wheel, remove any rust or dirt from the places where the wheel attaches to the vehicle. In an emergency, you can use a cloth or a paper towel to do this; but be sure to use a scraper or wire brush later, if you need to, to get all the rust or dirt off.

CAUTION:

Never use oil or grease on studs or nuts. If you do, the nuts might come loose. Your wheel could fall off, causing a serious accident.

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5. After mounting the

spare, replace the wheel nuts with the rounded end of the nuts toward the wheel. Tighten each wheel nut by hand using the wheel wrench until the wheel is held against the hub.

Rear Position 1500 Series

Rear Position 2500 Series

6. Turn the wheel wrench counterclockwise to lower

the vehicle. Lower the jack completely.

Front Position

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CAUTION:

Incorrect wheel nuts or improperly tightened wheel nuts can cause the wheel to become loose and even come off. This could lead to an accident. Be sure to use the correct wheel nuts. If you have to replace them, be sure to get new GM original equipment wheel nuts. Stop somewhere as soon as you can and have the nuts tightened with a torque wrench to the proper torque. See “Capacities and Specifications” in the Index.

NOTICE:

Improperly tightened wheel nuts can lead to brake pulsation and rotor damage. To avoid expensive brake repairs, evenly tighten the wheel nuts in the proper sequence and to the proper torque specification.

7. Tighten the nuts firmly in a crisscross sequence as

shown by turning the wheel wrench clockwise.

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Storing a Flat or Spare Tire and Tools

CAUTION:

Storing a jack, a tire or other equipment in the passenger compartment of the vehicle could cause injury. In a sudden stop or collision, loose equipment could strike someone. Store all these in the proper place.

Store the flat tire where the spare tire was stored. Store the tire under the rear of the vehicle in the spare tire carrier. To store the tire: 1. Put the tire on the ground at the rear of the vehicle

with the valve stem pointed upward.

2. Tilt the retainer downward and through the wheel

opening. Make sure the retainer is fully seated across the underside of the wheel.

3. Attach the wheel wrench and extensions together.

Insert the hoist end through the hole in the rear bumper and into the hoist shaft.

4. Raise the tire part way upward. Make sure the

retainer is seated in the wheel opening.

5. Raise the tire fully against the underside of the

vehicle. Continue turning the wheel wrench until the tire is secure and the cable is tight. The spare tire hoist cannot be overtightened.

6. Make sure the tire is stored securely. Push, pull, and

then try to rotate or turn the tire. If the tire moves, use the wheel wrench to tighten the cable.

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Replace the jack, tools and spare tire lock.

A. Hoist Assembly B. Wheel Wrench C. Jack Handle Extensions D. Hoist Shaft

E. Valve Stem, Pointed Up

F. Flat or Spare Tire G. Tire Retainer H. Hoist Cable

To store the tools, follow these procedures.

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For Utility Models: 1. Put the tool kit with the jack tools and gloves in the

tool bag and place in the retaining dip under the driver’s side second seat.

2. Tighten down with the the wing nut. 3. Then, assemble wheel chocks and bottle jack together with the wing nut and retaining hook.

4. Position behind the jack storage cover in the left rear

side panel just below the speaker and tighten, adjusting clockwise until the jack is secured tight in mounting bracket.

For Suburban/Yukon XL Models: 1. Return the tool kit (jack tools and gloves) to the tool bag. 2. Assemble wheel chocks and bottle jack together with

the wingnut and retaining hook.

3. Position behind the jack storage cover in the left rear

side panel just below the speaker and tighten, adjusting clockwise until the jack is secured tight in mounting bracket.

4. Use the retaining clip to fasten the tool kit on the

stud in the storage compartment in the rear left trim panel and turn wingnut clockwise to secure.

5. Return the storage tray. See the jacking label for

further information.

NOTICE:

Spinning your wheels can destroy parts of your vehicle as well as the tires. If you spin the wheels too fast while shifting your transmission back and forth, you can destroy your transmission.

For information about using tire chains on your vehicle, see “Tire Chains” in the Index.

If You’re Stuck: In Sand, Mud, Ice or Snow In order to free your vehicle when it is stuck, you will need to spin the wheels, but you don’t want to spin your wheels too fast. The method known as “rocking” can help you get out when you’re stuck, but you must use caution.

CAUTION:

If you let your tires spin at high speed, they can explode, and you or others could be injured. And, the transmission or other parts of the vehicle can overheat. That could cause an engine compartment fire or other damage. When you’re stuck, spin the wheels as little as possible. Don’t spin the wheels above 35 mph (55 km/h) as shown on the speedometer.

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Using the Recovery Hooks

Rocking Your Vehicle To Get It Out First, turn your steering wheel left and right. That will clear the area around your front wheels. If you have a four-wheel drive vehicle, shift into 4HI or 4LO. If your vehicle has the Traction Assist System, you should turn it off by pressing the TAS on/off button. Then shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little as possible. Release the accelerator pedal while you shift, and press lightly on the accelerator pedal when the transmission is in gear. By slowly spinning your wheels in the forward and reverse directions, you will cause a rocking motion that may free your vehicle. If that doesn’t get you out after a few tries, you may need to be towed out. Or, you can use your recovery hooks if your vehicle has them. If you do need to be towed out, see “Towing Your Vehicle” in the Index.

Your vehicle may be equipped with recovery hooks. The recovery hooks are provided at the front of your vehicle. You may need to use them if you’re stuck off-road and need to be pulled to some place where you can continue driving.

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CAUTION:

The recovery hooks, when used, are under a lot of force. Always pull the vehicle straight out. Never pull on the hooks at a sideways angle. The hooks could break off and you or others could be injured from the chain or cable snapping back.

NOTICE:

Never use the recovery hooks to tow the vehicle. Your vehicle could be damaged and it would not be covered by warranty.

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Section 6 Service and Appearance Care

Here you will find information about the care of your vehicle. This section begins with service and fuel information, and then it shows how to check important fluid and lubricant levels. There is also technical information about your vehicle, and a part devoted to its appearance care.

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Service Fuel Fuels in Foreign Countries Filling Your Tank Filling a Portable Fuel Container Checking Things Under the Hood Engine Oil Engine Air Cleaner/Filter Passenger Compartment Air Filter (If Equipped) Automatic Transmission Fluid Rear Axle Four-Wheel Drive Engine Coolant Coolant Surge Tank Pressure Cap Power Steering Fluid

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Windshield Washer Fluid Brakes Battery Bulb Replacement Windshield Wiper Blade Replacement Tires Appearance Care Cleaning the Inside of Your Vehicle Cleaning the Outside of Your Vehicle GM Vehicle Care/Appearance Materials Vehicle Identification Number (VIN) Electrical System Replacement Bulbs Capacities and Specifications Normal Maintenance Replacement Parts

6-1

Service Your dealer knows your vehicle best and wants you to be happy with it. We hope you’ll go to your dealer for all your service needs. You’ll get genuine GM parts and GM-trained and supported service people. We hope you’ll want to keep your GM vehicle all GM. Genuine GM parts have one of these marks:

Doing Your Own Service Work If you want to do some of your own service work, you’ll want to use the proper service manual. It tells you much more about how to service your vehicle than this manual can. To order the proper service manual, see “Service and Owner Publications” in the Index. Your vehicle may have an air bag system. If it does, see “Servicing Your Air Bag-Equipped Vehicle” in the Index before attempting to do your own service work. You should keep a record with all parts receipts and list the mileage and the date of any service work you perform. See “Maintenance Record” in the Index.

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CAUTION:

You can be injured and your vehicle could be damaged if you try to do service work on a vehicle without knowing enough about it. D Be sure you have sufficient knowledge,

experience, the proper replacement parts and tools before you attempt any vehicle maintenance task.

D Be sure to use the proper nuts, bolts and other fasteners. “English” and “metric” fasteners can be easily confused. If you use the wrong fasteners, parts can later break or fall off. You could be hurt.

Adding Equipment to the Outside of Your Vehicle Things you might add to the outside of your vehicle can affect the airflow around it. This may cause wind noise and affect windshield washer performance. Check with your dealer before adding equipment to the outside of your vehicle.

Fuel Use regular unleaded gasoline rated at 87 octane or higher. It is recommended that the gasoline meet specifications which have been developed by the American Automobile Manufacturers Association (AAMA) and endorsed by the Canadian Motor Vehicle Manufacturers Association for better vehicle performance and engine protection. Gasolines meeting the AAMA specification could provide improved driveability and emission control system performance compared to other gasolines. Be sure the posted octane is at least 87. If the octane is less than 87, you may get a heavy knocking noise when you drive. If it’s bad enough, it can damage your engine. If you’re using fuel rated at 87 octane or higher and you hear heavy knocking, your engine needs service. But don’t worry if you hear a little pinging noise when you’re accelerating or driving up a hill. That’s normal, and you don’t have to buy a higher octane fuel to get rid of pinging. It’s the heavy, constant knock that means you have a problem.

6-3

To provide cleaner air, all gasolines in the United States are now required to contain additives that will help prevent deposits from forming in your engine and fuel system, allowing your emission control system to function properly. Therefore, you should not have to add anything to the fuel. In addition, gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines may be available in your area to contribute to clean air. General Motors recommends that you use these gasolines, particularly if they comply with the specifications described earlier.

NOTICE:

Your vehicle was not designed for fuel that contains methanol. Don’t use it. It can corrode metal parts in your fuel system and also damage plastic and rubber parts. That damage wouldn’t be covered under your warranty.

If your vehicle is certified to meet California Emission Standards (indicated on the underhood emission control label), it is designed to operate on fuels that meet California specifications. If such fuels are not available in states adopting California emissions standards, your vehicle will operate satisfactorily on fuels meeting federal specifications, but emission control system performance may be affected. The malfunction indicator lamp on your instrument panel may turn on and/or your vehicle may fail a smog-check test. (See “Malfunction Indicator Lamp” in the Index.) If this occurs, return to your authorized GM dealer for diagnosis to determine the cause of failure. In the event it is determined that the cause of the condition is the type of fuels used, repairs may not be covered by your warranty. Some gasolines that are not reformulated for low emissions may contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT); ask your service station operator whether or not the fuel contains MMT. General Motors does not recommend the use of such gasolines. If fuels containing MMT are used, spark plug life may be reduced and your emission control system performance may be affected. The malfunction indicator lamp on your instrument panel may turn on. If this occurs, return to your authorized GM dealer for service.

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Fuels in Foreign Countries If you plan on driving in another country outside the United States or Canada, the proper fuel may be hard to find. Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel wouldn’t be covered by your warranty. To check on fuel availability, ask an auto club, or contact a major oil company that does business in the country where you’ll be driving. You can also write us at the following address for advice. Just tell us where you’re going and give your Vehicle Identification Number (VIN).

General Motors Overseas Distribution Corporation 1908 Colonel Sam Drive Oshawa, Ontario L1H 8P7

Filling Your Tank

CAUTION:

Gasoline vapor is highly flammable. It burns violently, and that can cause very bad injuries. Don’t smoke if you’re near gasoline or refueling your vehicle. Keep sparks, flames and smoking materials away from gasoline.

The fuel cap is located on the driver’s side of your vehicle.

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CAUTION:

If you get gasoline on yourself and then something ignites it, you could be badly burned. Gasoline can spray out on you if you open the fuel filler cap too quickly. This spray can happen if your tank is nearly full, and is more likely in hot weather. Open the fuel filler cap slowly and wait for any “hiss” noise to stop. Then unscrew the cap all the way.

While refueling, hang the filler cap by the tether using the hook located on the inside of the filler door. To remove the cap, turn it slowly to the left (counterclockwise).

Be careful not to spill gasoline. Clean gasoline from painted surfaces as soon as possible. See “Cleaning the Outside of Your Vehicle” in the Index.

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When you put the cap back on, turn it to the right (clockwise) until you hear a clicking sound. Make sure you fully install the cap. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the atmosphere. See “Malfunction Indicator Lamp” in the Index.

NOTICE:

If you need a new cap, be sure to get the right type. Your dealer can get one for you. If you get the wrong type, it may not fit properly. This may cause your malfunction indicator lamp to light and your fuel tank and emissions system may be damaged. See “Malfunction Indicator Lamp” in the Index.

Filling a Portable Fuel Container

CAUTION:

Never fill a portable fuel container while it is in your vehicle. Static electricity discharge from the container can ignite the gasoline vapor. You can be badly burned and your vehicle damaged if this occurs. To help avoid injury to you and others: D Dispense gasoline only into

approved containers.

D Do not fill a container while it is inside a vehicle, in a vehicle’s trunk, pickup bed or on any surface other than the ground.

D Bring the fill nozzle in contact with the

inside of the fill opening before operating the nozzle. Contact should be maintained until the filling is complete.

D Don’t smoke while pumping gasoline.

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Checking Things Under the Hood

CAUTION:

Things that burn can get on hot engine parts and start a fire. These include liquids like fuel, oil, coolant, brake fluid, windshield washer and other fluids, and plastic or rubber. You or others could be burned. Be careful not to drop or spill things that will burn onto a hot engine.

To open the hood, first pull the handle inside the vehicle located under and to the left of the steering wheel.

Then go to the front of the vehicle and pull up on the secondary hood release located just to the passenger’s side of the center of the grill. Lift the hood. Before closing the hood, be sure all filler caps are on properly. Pull down the hood and close it firmly.

Hood Release

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VORTEC 4800, 5300 and 6000 V8 Engine VORTEC 5300 V8 engine shown, locations for other engines similar.

A. Engine Air Cleaner/Filter B. Coolant Surge Tank C. Air Filter Restriction Indicator D. Engine Oil Dipstick E. Automatic Transmission Dipstick

(If Equipped)

F. Engine Oil Fill G. Fan H. Remote Negative Terminal (GND) I. Power Steering Fluid Reservoir J. Remote Positive Terminal

K. Brake Fluid Reservoir L. Underhood Electrical Center M. Battery N. Windshield Washer

Fluid Reservoir

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Engine Oil

If the CHECK ENG OIL LEVEL appears on the instrument panel, it means you need to check your engine oil level right away.

The engine oil dipstick has a yellow ring handle and is located on the passenger’s side of the engine.

For more information, see CHECK ENG OIL LEVEL in the Index. You should check your engine oil level regularly; this is an added reminder. Checking Engine Oil It’s a good idea to check your engine oil every time you get fuel. In order to get an accurate reading, the oil must be warm and the vehicle must be on level ground.

Turn off the engine and give the oil several minutes to drain back into the oil pan. If you don’t, the oil dipstick might not show the actual level. Pull out the dipstick and clean it with a paper towel or cloth, then push it back in all the way. Remove it again, keeping the tip down, and check the level.

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When to Add Engine Oil If the oil is at or below the ADD mark, then you’ll need to add at least one quart of oil. But you must use the right kind. This part explains what kind of oil to use. For crankcase capacity, see “Capacities and Specifications” in the Index.

NOTICE:

Don’t add too much oil. If your engine has so much oil that the oil level gets above the cross-hatched area that shows the proper operating range, your engine could be damaged.

The engine oil fill cap for the VORTEC 4800, 5300
and 6000 V8 engines is located on the passenger’s side engine valve cover.

Be sure to fill it enough to put the level somewhere in the proper operating range. Push the dipstick all the way back in when you’re through.

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What Kind of Engine Oil to Use Oils recommended for your vehicle can be identified by looking for the starburst symbol. This symbol indicates that the oil has been certified by the American Petroleum Institute (API). Do not use any oil which does not carry this starburst symbol.

If you change your own oil, be sure you use oil that has the starburst symbol on the front of the oil container. If you have your oil changed for you, be sure the oil put into your engine is American Petroleum Institute certified for gasoline engines.

You should also use the proper viscosity oil for your vehicle, as shown in the following chart:

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As shown in the chart, SAE 5W-30 is best for your vehicle. However, you can use SAE 10W-30 if it’s going to be 0_F (-18_C) or above. These numbers on an oil container show its viscosity, or thickness. Do not use other viscosity oils, such as SAE 20W-50.

NOTICE:

Use only engine oil with the American Petroleum Institute Certified For Gasoline Engines starburst symbol. Failure to use the recommended oil can result in engine damage not covered by your warranty.

GM GoodwrenchR oil meets all the requirements for your vehicle. If you are in an area where the temperature falls below -20_F (-29_C), consider using either an SAE 5W-30
synthetic oil or an SAE 0W-30 oil. Both will provide easier cold starting and better protection for your engine at extremely low temperatures.

Engine Oil Additives Don’t add anything to your oil. The recommended oils with the starburst symbol are all you will need for good performance and engine protection. When to Change Engine Oil Your vehicle has a computer that lets you know when to change your engine oil. This is not based on mileage, but on engine revolutions and engine operating temperature. When the computer has calculated that the oil needs changing, the GM Oil Life Systemt will indicate that a change is necessary. The mileage between oil and filter changes will vary depending on how you drive your vehicle -- usually between 3,000 miles (5 000 km) and 7,500 miles (12 500 km) since your last oil and filter change. Under severe conditions, the system may come on before 3,000 miles (5 000 km). Never drive your vehicle more than 7,500 miles (12 500 km) or 12 months (whichever occurs first) without an oil change. The system won’t detect dust in the oil. So, if you drive in a dusty area, be sure to change your oil and filter every 3,000 miles (5 000 km) or sooner. Remember to reset the CHANGE ENGINE OIL