2012 GMC Sierra Owners Manual

1-19

Do not adjust the steering wheel while driving.

Throttle and Brake Pedal Adjustment On vehicles with this feature, you can change the position of the throttle and brake pedals.

The tilt lever is located on the lower left side of the steering column. To adjust the steering wheel: 1. Hold the steering wheel and pull

the lever.

2. Move the steering wheel up

or down.

3. Release the lever to lock the

wheel in place.

The control used to adjust the pedals is located on the instrument panel below the climate control system. Press the bottom of the control to move the pedals closer to your body. Press the top of the control to move the pedals away. See Adjustable Throttle and Brake Pedal on page 9‑25.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (20,1)

1-20

In Brief

Interior Lighting

Dome Lamps The dome lamps are located in the overhead console. They come on when any door is opened and turn off after all the doors are closed. Turn the instrument panel brightness knob located below the dome lamp override button, clockwise to the farthest position to manually turn on the dome lamps. The dome lamps remain on until the knob is turned counterclockwise.

Dome Lamp Override The dome lamp override button is located next to the exterior lamps control.

k : Press the button in and the dome lamps remain off when a door is opened. Press the button again to return it to the extended position so that the dome lamps come on when a door is opened.

Reading Lamps For vehicles with reading lamps in the overhead console, press the button located next to the lamp to turn it on or off. The vehicle may also have reading lamps in other locations. The lamps cannot be adjusted. For more information about interior lamps, see: . Dome Lamps on page 6‑8. . Reading Lamps on page 6‑8. Instrument Panel Illumination Control on page 6‑7.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (21,1)

Exterior Lighting

The exterior lamps control is located on the instrument panel to the left of the steering wheel. O : Turns off the automatic headlamps and Daytime Running Lamps (DRL). Turn the headlamp control to the off position again to turn the automatic headlamps or DRL back on.

For vehicles first sold in Canada, the off position will only work when the vehicle is shifted into P (Park). AUTO: Automatically turns on the headlamps, parking lamps, taillamps, instrument panel lights, and license plate lamps. ; : Turns on the parking lamps, taillamps, instrument panel lights, and license plate lamps. 5 : Turns on the headlamps, parking lamps, taillamps, instrument panel lights, and license plate lamps. For more information, see: . Exterior Lamp Controls on

page 6‑1.

. Daytime Running Lamps (DRL)

on page 6‑3. Fog Lamps on page 6‑6.

In Brief

1-21

Windshield Wiper/Washer

The front wiper control is located on the turn and lane‐change lever. The windshield wipers are controlled by turning the band with z on it. 8 : For a single wipe, turn to 8, then release. For several wipes, hold the band on 8 longer. 9 : Turns the windshield wipers off. 6 : Turn the band up for more frequent wipes or down for less frequent wipes.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (22,1)

1-22

In Brief

6 : Slow wipes. ? : Fast wipes. L : Push the paddle at the top of the lever to spray washer fluid on the windshield. See Windshield Wiper/Washer on page 5‑4.

Climate Controls

These systems control the heating, cooling, and ventilation. Climate Control System (With Air Conditioning)

A. Fan Control B. Temperature Control C. Air Delivery Mode Control D. Air Conditioning

E. Outside Air F. Air Recirculation G. Rear Window Defogger

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (23,1)

Climate Control System (With Heater Only)

In Brief

1-23

A. Fan Control B. Temperature Control C. Air Delivery Mode Control

See Climate Control Systems (with Air Conditioning) on page 8‑1 or Climate Control Systems (with Heater Only) on page 8‑4.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (24,1)

1-24

In Brief

Dual Automatic Climate Control System

A. Driver and Passenger Temperature Controls

B. Fan Control C. AUTO D. Defrost E. Air Recirculation F. Outside Air G. Air Delivery Mode Control

Power Button

H. Display I. J. Rear Window Defogger K. Air Conditioning L. PASS (Passenger) See Dual Automatic Climate Control System on page 8‑5.

Transmission

Range Selection Mode

The Range Selection Mode switch, if equipped, is located on the shift lever. To enable the Range Selection feature: 1. Move the column shift lever to

the M (Manual) position. The current range will appear next to the M. This is the highest attainable range with all lower gears accessible. As an example, when 5 (Fifth) gear is selected, 1 (First) through 5 (Fifth) gears are available.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (25,1)

Manual Transfer Case

Electronic Transfer Case

In Brief

1-25

This transfer case shift lever is on the floor to the right of the driver.

This transfer case knob is located next to the steering column.

2. Press the plus/minus buttons, located on the steering column shift lever, to select the desired range of gears for current driving conditions. See Manual Mode on page 9‑38.

While using Range Selection Mode, cruise control and the Tow/Haul mode can be used. Grade Braking is not available when Range Selection Mode is active. See Tow/Haul Mode on page 9‑39.

Four-Wheel Drive If the vehicle has Four-Wheel Drive, you can send the engine's driving power to all four wheels for extra traction. Transfer Case Buttons The vehicle will have one of these three styles of transfer case controls. Use these controls to shift into and out of the different Four-Wheel Drive modes.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (26,1)

1-26

In Brief

Automatic Transfer Case

This transfer case knob is located next to the steering column. Each transfer case design offers different drive options. The list below describes the different drive options that may be available.

2 m (Two-Wheel-Drive High): This setting is used for driving in most street and highway situations. AUTO (Automatic Four-Wheel Drive): This setting is ideal for use when road surface traction conditions are variable. 4 m (Four-Wheel High): Use the Four-Wheel-Drive High position when extra traction is needed, such as on snowy or icy roads or in most off-road situations.

N (Neutral): Shift the transfer case to Neutral only when towing the vehicle. See Recreational Vehicle Towing on page 10‑93 or Trailer Towing on page 9‑78. 4 n (Four-Wheel-Drive Low): This setting 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. See Four-Wheel Drive on page 9‑40.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (27,1)

Vehicle Features Radio(s)

Radio with USB, CD, and DVD (MP3)

O : Press to turn the system on and off. Turn to increase or decrease the volume.

BAND: Press to choose between FM, AM, or XM™, if equipped. f : Select radio stations.

In Brief

1-27

© SEEK or ¨ SEEK: Seek or scan stations. 4 : Press to switch the display between the radio station frequency and the time. While the ignition is off, press this button to display the time. Press to display additional text information related to the current FM-RDS or XM station; or CD, MP3, or WMA song. If information is available during XM, CD, MP3, or WMA playback, the song title information displays on the top line of the display and artist information displays on the bottom line. When information is not available, “NO INFO” displays. For more information about these and other radio features, see Operation on page 7‑3. For vehicles with a Rear Seat Entertainment System (RSE) and Rear Seat Audio System (RSA), see Rear Seat Entertainment (RSE) System on page 7‑37 and Rear Seat Audio (RSA) System on page 7‑46 for more information.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (28,1)

1-28

In Brief

Storing Radio Stations A maximum of 36 stations can be stored as favorites using the six softkeys located below the radio station frequency tabs and by using the radio FAV button. Press FAV to go through up to six pages of favorites, each having six favorite stations available per page. Each page of favorites can contain any combination of AM, FM, or XM stations. For more information, see “Storing Radio Stations” in AM-FM Radio on page 7‑9. Setting the Clock To set the time and date: 1. Turn the ignition key to ACC/

ACCESSORY or ON/RUN, then press O , to turn the radio on. 2. Press H to display HR, MIN,

MM, DD, and YYYY (hour, minute, month, day, and year).

3. Press the softkey located under

any one of the labels to be changed.

4. To increase or decrease the time

or date, turn f clockwise or counter‐clockwise.

For detailed instructions on setting the clock for the vehicle's specific audio system, see Clock on page 5‑7.

Satellite Radio XM is a satellite radio service based in the 48 contiguous United States and 10 Canadian provinces. XM satellite radio has a wide variety of programming and commercial-free music, coast to coast, and in digital-quality sound.

A fee is required to receive the XM service. For more information, refer to: . www.xmradio.com or call

1-800-929-2100 (U.S.) . www.xmradio.ca or call

1-877-438-9677 (Canada)

See Satellite Radio on page 7‑11.

Portable Audio Devices This vehicle may have an auxiliary input located on the radio faceplate and a USB port located in the center console or on the instrument panel. External devices such as an iPod®, laptop computer, MP3 player, CD changer, or USB storage device can be connected to the auxiliary port using a 3.5 mm (1/8 in) input cable or the USB port depending on the audio system. See “Using the Auxiliary Input Jack” and “Using the USB Port” in Auxiliary Devices on page 7‑32.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (29,1)

Bluetooth® For vehicles with a Bluetooth system, it allows users with a Bluetooth‐enabled cell phone to make and receive hands-free calls using the vehicle’s audio system and controls. The Bluetooth‐enabled cell phone must be paired with the Bluetooth system before it can be used in the vehicle. Not all phones will support all functions. For more information, visit www.gm.com/bluetooth. For more information, see Bluetooth on page 7‑48.

In Brief

1-29

b / g : Press to silence the vehicle speakers only. Press again to turn the sound on. Press and hold longer than two seconds to interact with OnStar® or Bluetooth systems, if equipped.

+ e : Press to increase volume.

− e : Press to decrease volume.

SRCE: Press to switch between the radio and CD, and for equipped vehicles, the DVD, front auxiliary, and rear auxiliary. ¨ : Press to seek the next radio station, the next track or chapter while sourced to the CD or DVD slot, or to select tracks and folders on an iPod or USB device. For more information, see Steering Wheel Controls on page 5‑2.

Steering Wheel Controls

If available, some audio controls can be adjusted at the steering wheel. w : Press to go to the next favorite radio station, track on a CD, or folder on an iPod® or USB device. c / x : Press to go to the previous favorite radio station, track on a CD, or folder on an iPod® or USB device. Press to reject an incoming call, or to end a call.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (30,1)

1-30

In Brief

Cruise Control

T : Press to turn the system on or off. The indicator light is on when cruise control is on and turns off when cruise control is off. + RES: Press briefly to make the vehicle resume to a previously set speed, or press and hold to accelerate. SET −: Press to set the speed and activate cruise control or make the vehicle decelerate.

[ : Press to disengage cruise control without erasing the set speed from memory. See Cruise Control on page 9‑58.

Navigation System If the vehicle has a navigation system, there is a separate navigation system manual that includes information on the radio, audio players, and navigation system. The navigation system provides detailed maps of most major freeways and roads. After a destination has been set, the system provides turn-by-turn instructions for reaching the destination. In addition, the system can help locate a variety of points of interest (POIs), such as banks, airports, restaurants, and more. See the navigation system manual for more information.

Driver Information Center (DIC) The DIC display is located at the bottom of the instrument panel cluster. It shows the status of many vehicle systems and enables access to the personalization menu.

The DIC buttons are located on the instrument panel, next to the steering wheel. Some vehicles do not have the buttons shown, however some of the menus can be viewed by using the trip odometer reset stem.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (31,1)

3 : Press to display the odometer, trip odometer, fuel range, average economy, fuel used, timer, instantaneous economy and Active Fuel Management™ indicator, and transmission temperature. The compass and outside air temperature will also be shown in the display. The temperature will be shown in °C or °F depending on the units selected. T : Press to display the oil life, units, tire pressure readings for vehicles with the Tire Pressure Monitor System (TPMS), trailer brake gain and output information for vehicles with the Integrated Trailer Brake Control (ITBC) system, engine hours, compass zone setting, and compass recalibration. U : Press to customize the feature settings on your vehicle. See Vehicle Personalization (With DIC Buttons) on page 5‑48 for more information.

V : Press to set or reset certain functions and to turn off or acknowledge messages on the DIC. For more information, see Driver Information Center (DIC) on page 5‑30. Vehicle Customization Some vehicle features can be programmed by using the DIC buttons next to the steering wheel. These features include:

Language

. Door Lock and Unlock Settings . RKE Lock and Unlock Feedback

Lighting

. Chime Volume . Memory Features See Vehicle Personalization (With DIC Buttons) on page 5‑48.

In Brief

1-31

Rear Vision Camera (RVC) If available, the RVC displays a view of the area behind the vehicle when the vehicle is shifted into R (Reverse). This is displayed on the inside rearview mirror or the navigation screen, if equipped. To clean the camera lens, located in the bezel of the tailgate handle, rinse it with water and wipe it with a soft cloth. For more information, see Rear Vision Camera (RVC) on page 9‑62.

Ultrasonic Parking Assist If available, the Ultrasonic Rear Parking Assist (URPA) system uses sensors on the rear bumper to assist with parking and avoiding objects while in R (Reverse). It operates at speeds less than 8 km/h (5 mph). URPA uses audible beeps to provide distance and system information.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (32,1)

1-32

In Brief

Keep the sensors on the vehicle's rear bumper clean to ensure proper operation. See Ultrasonic Parking Assist on page 9‑61.

Power Outlets Accessory power outlets can be used to plug in electrical equipment, such as a cell phone, MP3
player, etc. The vehicle may have two accessory power outlets located below the climate control system, or may have one accessory power outlet and one cigarette lighter. The cigarette lighter is designed to fit only in the receptacle closest to the driver. There may be another accessory power outlet in the rear cargo area. If the vehicle has a floor console, there is an accessory power outlet inside the storage bin and one on the rear of the floor console.

The accessory power outlets are powered, even when the ignition is in LOCK/OFF. Continuing to use power outlets while the ignition is in LOCK/OFF may cause the vehicle's battery to run down. See Power Outlets on page 5‑9.

Universal Remote System

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. Read the instructions completely before attempting to program the transmitter. Because of the steps involved, it may be helpful to have another person assist with programming the transmitter. See Universal Remote System on page 5‑56.

Vehicles with the Universal Remote System will have these buttons located in the headliner.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (33,1)

In Brief

1-33

Close: From the vent, or open position, press and hold the front of the switch to close the sunroof. The sunroof also has a roller sunshade that can be used to block the rays of the sun. To open the sunshade, press and unlatch it, and roll it back. To close, pull it forward and latch it into the closed position. See Sunroof (Crew Cab) on page 2‑23 or Sunroof (Extended Cab) on page 2‑22.

Vent: From the closed position, press and hold the rear of the switch to vent the sunroof. To close the sunroof, press and hold the front of the switch. Open: From the vent position, the sunroof can be fully opened either manually or by using the express-open feature. To open manually, press the rear of the switch to the first detent and hold until the sunroof has reached the desired position. To open using express-open, press the rear of the switch to the second detent and release. The sunroof will move to the full open position. To stop the sunroof partway, press the switch a second time.

Sunroof

Extended Cab

On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY or ON/RUN or the Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 9‑29 for more information.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (34,1)

1-34

In Brief

Crew Cab

A. Open or Close B. Vent On vehicles with a sunroof, the sunroof only operates when the ignition is in the ACC/ACCESSORY or ON/RUN or the Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 9‑29 for more information.

Vent: From the closed position, press the rear of the passenger side switch (B) to vent the sunroof. Manual-Open/Manual-Close: To open the sunroof, press and hold the rear of the driver side switch (A) until the sunroof reaches the desired position. Press and hold the front of the driver side switch to close it. Express-Open/Express-Close: To express-open the sunroof, fully press and release the rear of the driver side switch (A) until the sunroof reaches the desired position. To express-close the sunroof, fully press and release the front of the driver side switch. Press the switch again to stop it.

When the sunroof is opened, an air deflector will automatically raise. The air deflector will retract when the sunroof is closed. The sunroof also has a sunshade that you can pull forward to block the rays of the sun. The sunshade must be opened and closed manually. If an object is in the path of the sunroof while it is closing, the anti-pinch feature will detect the object and stop the sunroof. See Sunroof (Crew Cab) on page 2‑23 or Sunroof (Extended Cab) on page 2‑22.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (35,1)

Performance and Maintenance

StabiliTrak® System If equipped, the vehicle has a traction control system that limits wheel spin and the StabiliTrak system that assists with directional control of the vehicle in difficult driving conditions. Both systems turn on automatically every time the vehicle is started.

To turn off traction control, press and release g on the instrument panel. The appropriate DIC message displays. See Ride Control System Messages on page 5‑44. To turn off both traction control and StabiliTrak, press and hold g until g illuminates and the appropriate DIC message displays. See Ride Control System Messages on page 5‑44.

. Press and release g again to

turn on both systems. For more information, see StabiliTrak® System on page 9‑55.

Tire Pressure Monitor This vehicle may have a Tire Pressure Monitor System (TPMS).

The TPMS warning light alerts you to a significant loss in pressure of one of the vehicle's tires. If the warning light comes on, stop as soon as possible and inflate the tires to the recommended pressure shown on the Tire and Loading Information label. See Vehicle Load Limits on page 9‑16. The warning light will remain on until the tire pressure is corrected.

In Brief

1-35

During cooler conditions, the low tire pressure warning light may appear when the vehicle is first started and then turn off. This may be an early indicator that the tire pressures are getting low and the tires need to be inflated to the proper pressure. The TPMS does not replace normal monthly tire maintenance. It is the driver’s responsibility to maintain correct tire pressures. See Tire Pressure Monitor System on page 10‑60.

Engine Oil Life System The engine oil life system calculates engine oil life based on vehicle use and, on most vehicles, displays a DIC message when it is necessary to change the engine oil and filter. The oil life system should be reset to 100% only following an oil change.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (36,1)

1-36

In Brief

Resetting the Oil Life System To reset the Engine Oil Life System on most vehicles: 1. Display OIL LIFE REMAINING on the DIC. If the vehicle does not have DIC buttons, the vehicle must be in P (Park) to access this display.

2. Press and hold the SET/RESET

button on the DIC, or the trip odometer reset stem if the vehicle does not have DIC buttons, for more than five seconds. The oil life will change to 100%.

On all vehicles, the Engine Oil Life System can be reset as follows: 1. Turn the ignition to ON/RUN with

the engine off.

2. Fully press the accelerator pedal

slowly three times within five seconds.

3. Display OIL LIFE REMAINING

on the DIC. If the display shows 100%, the system is reset.

See Engine Oil Life System on page 10‑10.

Fuel E85 (85% Ethanol) Vehicles that have a FlexFuel badge and a yellow fuel cap can use either unleaded gasoline or ethanol fuel containing up to 85% ethanol (E85). See Fuel E85 (85% Ethanol) on page 9‑71. For all other vehicles, use only the unleaded gasoline described under Recommended Fuel on page 9‑68.

Driving for Better Fuel Economy Driving habits can affect fuel mileage. Here are some driving tips to get the best fuel economy possible. . Avoid fast starts and accelerate

smoothly.

. Brake gradually and avoid

abrupt stops.

. Avoid idling the engine for long

periods of time.

. When road and weather

conditions are appropriate, use cruise control.

. Always follow posted speed

limits or drive more slowly when conditions require.

. Keep vehicle tires properly

inflated.

. Combine several trips into a

single trip.

. Replace the vehicle's tires with

the same TPC Spec number molded into the tire's sidewall near the size. Follow recommended scheduled maintenance.

Roadside Assistance Program U.S.: 1-888-881-3302
TTY Users (U.S.): 1-888-889-2438
Canada: 1-800-268-6800
Mexico: 01-800-466-0801

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (37,1)

In Brief

1-37

OnStar® If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services. See OnStar Overview on page 14‑1.

As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance program. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside Assistance Program (Mexico) on page 13‑9.

Roadside Assistance and OnStar (U.S. and Canada) If you have an active OnStar subscription, press the Q button and the current GPS location will be sent to an OnStar advisor who will assess your problem, contact Roadside Assistance, and relay your exact location to get the help you need.

Online Owner Center (U.S. and Canada) The Online Owner Center is a complimentary service that includes online service reminders, vehicle maintenance tips, online owner manual, special privileges, and more. Sign up today at: U.S.: gmc.com (click on “Owners,” then “Manage My GMC/Owners Login”) Canada: gmcowner.ca

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (38,1)

1-38

In Brief

2 NOTES

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (1,1)

Keys, Doors, and Windows

Keys and Locks

Keys . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Remote Keyless Entry (RKE)

System . . . . . . . . . . . . . . . . . . . . . . 2-2

Remote Keyless Entry (RKE)

System Operation . . . . . . . . . . . 2-3
Remote Vehicle Start . . . . . . . . . 2-5
Door Locks . . . . . . . . . . . . . . . . . . . 2-7
Power Door Locks . . . . . . . . . . . . 2-8
Delayed Locking . . . . . . . . . . . . . . 2-8
Automatic Door Locks . . . . . . . . . 2-8
Lockout Protection . . . . . . . . . . . . 2-9
Safety Locks . . . . . . . . . . . . . . . . . . 2-9

Keys, Doors, and Windows

2-1

Doors

Interior Mirrors

Rear Doors

(Extended Cab) . . . . . . . . . . . . . . 2-9
Tailgate . . . . . . . . . . . . . . . . . . . . . . 2-10

Manual Rearview Mirror . . . . . . 2-18
Automatic Dimming Rearview

Mirror . . . . . . . . . . . . . . . . . . . . . . . 2-18

Vehicle Security

Windows

Vehicle Security . . . . . . . . . . . . . . 2-11
Anti-theft Alarm System . . . . . . 2-11
Immobilizer . . . . . . . . . . . . . . . . . . 2-12
Immobilizer Operation . . . . . . . 2-13

Exterior Mirrors

Convex Mirrors . . . . . . . . . . . . . . 2-14
Manual Mirrors . . . . . . . . . . . . . . . 2-14
Trailer-Tow Mirrors . . . . . . . . . . . 2-15
Power Mirrors . . . . . . . . . . . . . . . . 2-15
Folding Mirrors . . . . . . . . . . . . . . . 2-16
Heated Mirrors . . . . . . . . . . . . . . . 2-17
Park Tilt Mirrors . . . . . . . . . . . . . . 2-17

Windows . . . . . . . . . . . . . . . . . . . . . 2-19
Manual Windows . . . . . . . . . . . . 2-19
Power Windows . . . . . . . . . . . . . 2-20
Rear Windows . . . . . . . . . . . . . . . 2-21
Sun Visors . . . . . . . . . . . . . . . . . . . 2-21

Roof

Sunroof (Extended Cab) . . . . . 2-22
Sunroof (Crew Cab) . . . . . . . . . 2-23

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (2,1)

2-2

Keys, Doors, and Windows

Keys and Locks

Keys

{ WARNING

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 children could be seriously injured or killed if caught in the path of a closing window. Do not leave the keys in a vehicle with children.

Notice: If the keys get locked in the vehicle, it may have to be damaged to get them out. Always carry a spare key. If you are locked out of the vehicle, call the Roadside Assistance Center. See Roadside Assistance Program (U.S. and Canada) on page 13‑7 or Roadside Assistance Program (Mexico) on page 13‑9. With an active OnStar subscription, an OnStar Advisor may remotely unlock the vehicle. See OnStar Overview on page 14‑1.

Remote Keyless Entry (RKE) System See Radio Frequency Statement on page 13‑20 for information regarding Part 15 of the Federal Communications Commission (FCC) rules and Industry Canada Standards RSS-GEN/210/220/310.

The key is used for the ignition and all door locks. The key has a bar-coded key tag that the dealer or qualified locksmith can use to make new keys. Store this information in a safe place, not in the vehicle. See your dealer if a replacement key or additional key is needed.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (3,1)

Keys, Doors, and Windows

2-3

If there is a decrease in the RKE operating range: . Check the distance. The

transmitter may be too far from the vehicle.

. Check the location. Other vehicles or objects may be blocking the signal.

. Check the transmitter's battery.

See “Battery Replacement” later in this section. If the transmitter is still not working correctly, see your dealer or a qualified technician for service.

Remote Keyless Entry (RKE) System Operation The Remote Keyless Entry (RKE) transmitter functions work up to 60 m (195 ft) away from the vehicle. There are other conditions which can affect the performance of the transmitter. See Remote Keyless Entry (RKE) System on page 2‑2.

With Remote Start (without

Remote Start Similar)

/ (Remote Vehicle Start): For vehicles with this feature, press / to start the engine from outside the vehicle using the RKE transmitter. See Remote Vehicle Start on page 2‑5 for additional information. Q (Lock): Press to lock all the doors. If enabled through the Driver Information Center (DIC), the turn signal lamps flash once to indicate locking has occurred. If enabled through the DIC, the horn chirps

when Q is pressed again within three seconds. See Vehicle Personalization (With DIC Buttons) on page 5‑48 for additional information. Pressing Q arms the content theft‐deterrent system. See Anti-theft Alarm System on page 2‑11. K (Unlock): Press once to unlock only the driver door. If K is pressed again within three seconds, all remaining doors unlock. The interior lamps may come on and stay on for 20 seconds or until the ignition is turned on. If enabled through the DIC, the turn signal lamps flash twice to indicate unlocking has occurred. See Vehicle Personalization (With DIC Buttons) on page 5‑48. If enabled through the DIC, the exterior lights may turn on. See “Approach Lighting” under Vehicle Personalization (With DIC Buttons) on page 5‑48.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (4,1)

2-4

Keys, Doors, and Windows

When the replacement transmitter is programmed to this vehicle, all remaining transmitters must also be reprogrammed. Any lost or stolen transmitters will no longer work once the new transmitter is programmed. Each vehicle can have up to eight transmitters programmed to it. See your dealer for transmitter programming. Battery Replacement Replace the battery if the REPLACE BATTERY IN REMOTE KEY message displays in the DIC. Notice: When replacing the battery, do not touch any of the circuitry on the transmitter. Static from your body could damage the transmitter.

Pressing K on the RKE transmitter disarms the content theft‐deterrent system. See Anti-theft Alarm System on page 2‑11. L (Vehicle Locator/Panic Alarm): Press and release to locate the vehicle. The turn signal lamps flash and the horn sounds three times. Press and hold L for more than two seconds to activate the panic alarm. The turn signal lamps flash and the horn sounds repeatedly for 30 seconds. The alarm turns off when the ignition is moved to ON/RUN or L is pressed again. The ignition must be in LOCK/OFF for the panic alarm to work. Programming Transmitters to the Vehicle Only RKE transmitters programmed to this vehicle will work. If a transmitter is lost or stolen, a replacement can be purchased and programmed through your dealer.

To replace the battery: 1. Separate the transmitter with a

flat, thin object, such as a flat head screwdriver.

Carefully insert the tool into the notch located along the parting line of the transmitter. Do not insert the tool too far. Stop as soon as resistance is felt. Twist the tool until the transmitter is separated.

2. Remove the old battery. Do not

use a metal object.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (5,1)

Keys, Doors, and Windows

2-5

3.

Insert the new battery, positive side facing down. Replace with a CR2032 or equivalent battery.

4. Snap the transmitter back

together.

Remote Vehicle Start If available, this feature allows you to start the engine from outside of the vehicle. It may also start up the vehicle's heating or air conditioning systems and rear window defogger. Normal operation of the system will return after the key is turned to the ON/RUN position. If the vehicle has an automatic climate control system, the climate control system will default to a heating or cooling mode depending on the outside temperatures. If the vehicle does not have an automatic climate control system, the system will turn on at the setting the vehicle was set to when the vehicle was last turned off.

During a remote start, if the vehicle has an automatic climate control system and heated seats, the heated seats will turn on during colder outside temperatures and will shut off when the key is turned to ON/RUN. If the vehicle does not have an automatic climate control system, during remote start, manually turn the heated seats on and off. See Heated and Ventilated Front Seats on page 3‑9 for additional information. Laws in some communities may restrict the use of remote starters. For example, some laws may require a person using the remote start to have the vehicle in view when doing so. Check local regulations for any requirements on remote starting of vehicles. Do not use the remote start feature if the vehicle is low on fuel. The vehicle may run out of fuel.

If the vehicle has the remote start feature, the RKE transmitter functions will have an increased range of operation. However, the range may be less while the vehicle is running. There are other conditions which can affect the performance of the transmitter. See Remote Keyless Entry (RKE) System on page 2‑2 for additional information. / (Remote Start): This button will be on the RKE transmitter if the vehicle has remote start. To start the vehicle using the remote start feature: 1. Aim the RKE transmitter at the

vehicle.

2. Press and release Q. Immediately press and 3. hold / until the turn signal lamps flash. If you cannot see the vehicle's lamps, press and hold / for two to four seconds.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (6,1)

2-6

Keys, Doors, and Windows

When the vehicle starts, the parking lamps will turn on and remain on while the vehicle is running. The doors will be locked and the climate control system may come on. The engine will continue to run for 10 minutes. Repeat the steps for a 10-minute time extension. Remote start can be extended only once.

After entering the vehicle during a remote start, insert and turn the key to ON/RUN to drive the vehicle. To cancel a remote start: . Aim the RKE transmitter at the vehicle and press and hold / until the parking lamps turn off. Turn on the hazard warning flashers. Turn the ignition on and then back off.

The vehicle can be remote started two separate times between driving sequences. The engine will run for 10 minutes after each remote start. Or, you can extend the engine run time by another 10 minutes within the first 10 minute remote start time frame, and before the engine stops. For example, if Q and then / are pressed again after the vehicle has been running for five minutes, 10 minutes are added, allowing the engine to run for 15 minutes. The additional 10 minutes are considered a second remote vehicle start. Once two remote starts, or a single remote start with one time extension has been done, the vehicle must be started with the key. After the key is removed from the ignition, the vehicle can be remote started again.

The vehicle cannot be remote started if the key is in the ignition, the hood is not closed, or if there is an emission control system malfunction and the check engine light is on. 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. Remote Start Ready If the vehicle does not have the remote vehicle start feature, it may have the remote start ready feature. This feature allows your dealer to add the manufacturer's remote vehicle start feature. See your dealer to add the manufacturer's remote vehicle start feature to the vehicle.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (7,1)

Keys, Doors, and Windows

2-7

There are several ways to lock and unlock the vehicle. From outside, use the Remote Keyless Entry (RKE) transmitter or the key in the driver door. From 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.

WARNING (Continued)

. 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 the vehicle whenever leaving it.

. Outsiders can easily enter through an unlocked door when you slow down or stop the vehicle. Locking the doors can help prevent this from happening.

Door Locks

{ WARNING Unlocked doors can be dangerous.

. 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. The chance of being thrown out of the vehicle in a crash is increased if the doors are not locked. So, all passengers should wear safety belts properly and the doors should be locked whenever the vehicle is driven.

(Continued)

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (8,1)

2-8

Keys, Doors, and Windows

Power Door Locks

Crew Cab Premium Trim Shown,

Up-Level Similar

Base Trim

For vehicles with power door locks: Q : Press to lock the doors. K : Press to unlock the doors.

Delayed Locking The vehicle may have the delayed locking feature. When locking the doors with the power lock switch and a door 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 will override the delayed locking feature and immediately lock all the doors. This feature will not operate if the key is in the ignition. This feature can be programmed using the Driver Information Center (DIC). See “Delay Door Lock” under Vehicle Personalization (With DIC Buttons) on page 5‑48.

Automatic Door Locks The vehicle may have an automatic lock/unlock feature. This feature can be programmed using the Driver Information Center (DIC). See Vehicle Personalization (With DIC Buttons) on page 5‑48 for more information on DIC programming.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (9,1)

Lockout Protection If the driver side power door lock switch is pressed when the driver door is open and the key is in the ignition, all of the doors will lock and then the driver door will unlock. If the passenger side power door lock switch is pressed when the front passenger door is open and the key is in the ignition, all of the doors will lock and then the front passenger door will unlock.

Safety Locks The vehicle has rear door security locks to prevent passengers from opening the rear doors from the inside.

Keys, Doors, and Windows

2-9

Doors

Rear Doors (Extended Cab)

Open the rear doors to access the security locks on the inside edge of each door. To set the locks, insert a key into the slot and turn it to the horizontal position. The door can only be opened from the outside with the door unlocked. To return the door to normal operation, turn the slot to the vertical position.

To open a rear access door from the outside, first open the front door. Then, use the handle located on the front edge of the rear access door to open it.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (10,1)

2-10

Keys, Doors, and Windows

The rear access door must be closed before the front door can close.

Tailgate

{ WARNING

It is extremely dangerous to ride on the tailgate, even when the vehicle is operated at low speeds. People riding on the tailgate can easily lose their balance and fall in response to vehicle maneuvers. Falling from a moving vehicle may result in serious injuries or death. Do not allow people to ride on the tailgate. Be sure everyone in your vehicle is in a seat and using a safety belt properly.

On vehicles with a lock on the tailgate, use the key to lock or unlock the tailgate.

To open a rear access door from the inside, first open the front door. Then, use the handle located on the inside of the rear access door to open.

Open the tailgate by lifting up on its handle while pulling the tailgate down. To shut the tailgate, firmly push it upward until it latches. After closing the tailgate, pull it back to be sure it latches securely. Tailgate Removal The tailgate can be removed to allow for different loading situations. Assistance may be needed with the removal to avoid damage to the vehicle. On vehicles with a Rear Vision Camera, it must be disconnected before removing the tailgate. See Rear Vision Camera (RVC) on page 9‑62 for more information.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (11,1)

Keys, Doors, and Windows

2-11

To remove the tailgate:

2. With the tailgate about halfway

open, lift the right edge of the tailgate from the lower pivot. On vehicles with the tailgate assist feature, raise the tailgate nearly all the way to the closed position prior to removing the left edge.

3. Move the tailgate to the right to

release the left edge.

Reverse this procedure to reinstall the tailgate. Make sure the tailgate is secure.

1. Raise the tailgate slightly, pull

out and hold the cable retaining clip (A). Push the cable (C) up and off of the bolt (B). Repeat on the other side.

Vehicle Security This vehicle has theft-deterrent features; however, they do not make it impossible to steal.

Anti-theft Alarm System This 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. The security light should flash.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (12,1)

2-12

Keys, Doors, and Windows

If the delayed locking feature is active, the alarm will not be activated until all doors are closed and the security light goes off.

3. Close all doors. The security

light will stop flashing and go off after approximately 30 seconds. The system is armed when the security light goes off.

If a locked driver door is opened without using the RKE transmitter, a 10 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 10 second pre-alarm, the alarm will go off. The vehicle's headlamps will flash and the horn will sound for about 30 seconds, then will turn off to save the battery power. The theft-deterrent system will not activate if the doors are locked with the key or the manual door lock.

It activates only if you use the power door lock switch or the RKE transmitter. The vehicle can be started with the correct key if the alarm is 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.

. Always unlock a door with the

RKE transmitter.

If the alarm is set off, press unlock on the RKE transmitter or place the key in the ignition and turn it to START. Testing the Alarm To test the alarm: 1. Lower the driver window and

open the driver door.

2. Press lock on the RKE

transmitter.

3. Close the door and wait for the

security light to go out.

4. Reach in through the window,

unlock the door with the manual door lock, and open the door. This should set off the alarm.

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 10‑44. If the alarm does not sound or the headlamps do not flash, see your dealer for service.

Immobilizer See Radio Frequency Statement on page 13‑20 for information regarding Part 15 of the Federal Communications Commission (FCC) rules and Industry Canada Standards RSS-GEN/210/220/310.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (13,1)

Keys, Doors, and Windows

2-13

Immobilizer Operation This 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 the theft-deterrent system. Turn the ignition off and try again. 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 10‑44. If the engine still does not start with the other key, the vehicle needs service. If the vehicle does start, the first key may be faulty. See your dealer who can service the PASS-Key III+ to have a new key made. 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 or a locksmith who can service PASS-Key III+ to have keys made and programmed to the system. See your dealer or a locksmith who can service PASS-Key III+ to get a new key blank 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 for service.

3. After the engine has started, turn

the key to LOCK/OFF, and remove the key.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (14,1)

2-14

Keys, Doors, and Windows

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 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.

Exterior Mirrors

Convex Mirrors

{ WARNING

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 the right. Check the inside mirror or glance over your shoulder before changing lanes.

The passenger side mirror is convex shaped. A convex mirror's surface is curved so more can be seen from the driver seat.

Manual Mirrors If the vehicle has manual mirrors, they can be adjusted by moving the mirror up and down or left to right to see a little of the side of the vehicle, and have a clear view behind the vehicle. Using hood-mounted air deflectors and add-on convex mirror attachments could decrease mirror performance.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (15,1)

Trailer-Tow Mirrors

Power Mirrors

Keys, Doors, and Windows

2-15

The mirrors may also include a memory function that works with the memory seats. See Memory Seats on page 3‑7 for more information.

If the vehicle has towing mirrors, they can be adjusted for a clearer view of the objects behind you. Manually pull out the mirror head to extend it for better visibility when towing a trailer. The lower portion of the mirror is convex. A convex mirror's surface is curved to see more from the driver seat. The convex mirror can be adjusted manually to the driver preferred position for better vision. The mirror may have a turn signal arrow that flashes in the direction of the turn or lane change.

Crew Cab Premium Trim with Power Folding Mirrors Shown,

Other Models Similar

1. Press (A) or (B) to select the

driver or passenger side mirror. 2. Press the arrows on the control

pad to move the mirror up, down, right, or left.

3. Adjust each outside mirror so

that a little of the vehicle and the area behind it can be seen.

4. Press either (A) or (B) again to

deselect the mirror.

Crew Cab Up‐Level Trim without

Power Folding Mirrors

1. Move the selector switch located

above the four-way control pad to the left or right to choose either the driver side or passenger side mirror.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (16,1)

2-16

Keys, Doors, and Windows

Folding Mirrors

2. Press one of the four arrows located on the control pad to move the mirror in the desired direction.

3. Adjust each outside mirror so

that a little of the vehicle and the area behind it can be seen. Keep the selector switch in the center position when not adjusting either outside mirror.

Crew Cab Premium Trim with Power Folding Mirrors Shown,

Other Models Similar

Power Folding If equipped with power folding mirrors: 1. Press (A) to fold the mirrors out

to the driving position.

2. Press (B) to fold the mirrors in to

the folded position.

The mirrors may also include a memory function that works with the memory seats. See Memory Seats on page 3‑7 for more information.

Resetting the Power Folding Mirrors Reset the power folding mirrors if:

The mirrors are accidentally obstructed while folding. They are accidentally manually folded/unfolded. The mirrors will not stay in the unfolded position. The mirrors vibrate at normal driving speeds.

Fold and unfold the mirrors one time using the mirror controls to reset them to their normal position. A popping noise may be heard during the resetting of the power folding mirrors. This sound is normal after a manual folding operation.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (17,1)

Keys, Doors, and Windows

2-17

Manual Folding If equipped with manual folding mirrors, push the mirror toward the vehicle. Push the mirror outward, to return to its original position. Manually fold the mirrors inward to prevent damage when going through an automatic car wash. Automatic Dimming If equipped with an automatic dimming mirror, the driver outside mirror automatically dimes for the glare of the headlamps from behind. This feature is controlled by the on and off setting on the inside rearview mirror. See Automatic Dimming Rearview Mirror on page 2‑18.

Turn Signal Indicator The vehicle may also have a turn signal indicator on the mirror. An arrow on the mirror flashes in the direction of the turn or lane change.

Heated Mirrors For vehicles with heated mirrors: 1 (Rear Window Defogger): Press to heat the mirrors. If the vehicle has a towing mirror, only the upper glass of the mirror is heated. The lower convex part of the towing mirror is not heated. Depending on the vehicle's features, see “Rear Window Defogger” under Climate Control Systems (with Air Conditioning) on page 8‑1 or Climate Control Systems (with Heater Only) on page 8‑4 or Dual Automatic Climate Control System on page 8‑5 for more information.

Park Tilt Mirrors If the vehicle has the memory package, the passenger and/or driver mirror tilts to a preselected position when the vehicle is in R (Reverse). This feature lets the driver view the curb when parallel parking. The mirror(s) return to the original position when the vehicle is shifted out of R (Reverse), or the ignition is turned off or to OFF/LOCK. Turn this feature on or off through the Driver Information Center (DIC). See Vehicle Personalization (With DIC Buttons) on page 5‑48 for more information.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (18,1)

2-18

Keys, Doors, and Windows

Interior Mirrors

Manual Rearview Mirror To adjust the inside rearview mirror, hold the rearview mirror in the center and move it to view the area behind the vehicle. For vehicles with a manual rearview mirror, push the tab forward for daytime use and pull it for nighttime use to avoid glare from the headlamps from behind. Vehicles with OnStar® have three control buttons at the bottom of the mirror. See a dealer for more information about OnStar and how to subscribe to it. See OnStar Overview on page 14‑1.

Automatic Dimming Rearview Mirror The vehicle may have an automatic dimming inside rearview mirror. To adjust the inside rearview mirror, hold the rearview mirror in the center and move it to view the area behind the vehicle. The automatic dimming rearview mirror will automatically reduce the glare from the headlamps from behind. The dimming feature comes on when the vehicle is started. O (On/Off): Press to turn the dimming feature on or off. The vehicle may also have a Rear Vision Camera (RVC). See Rear Vision Camera (RVC) on page 9‑62
for more information.

If the vehicle has a RVC, the O button for turning the dimming feature on or off will not be available. Vehicles with OnStar have three additional control buttons for the OnStar system. See a dealer for more information about OnStar and how to subscribe to it. See OnStar Overview on page 14‑1. Cleaning the Mirror Do not spray glass cleaner directly on the mirror. Use a soft towel dampened with water.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (19,1)

Windows

{ WARNING

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.

Keys, Doors, and Windows

2-19

pulsing sound when a window is partially open. To reduce the sound, open another window or the sunroof (if equipped).

Manual Windows Turn the hand crank on each door to manually raise or lower the manual windows.

The vehicle aerodynamics are designed to improve fuel economy performance. This may result in a

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (20,1)

2-20

Keys, Doors, and Windows

Power Windows

{ WARNING

Leaving children in a vehicle with the keys 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 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.

Crew Cab Premium Trim Shown,

Others Models Similar

The driver door has a switch to control all windows. Each passenger door has a switch to control that window. The power windows only work when the ignition is in ON/RUN or ACC/ ACCESSORY, or when Retained Accessory Power (RAP) is active. See Retained Accessory Power (RAP) on page 9‑29.

Push the switch down to lower the window, and pull up the front of the switch to raise the window. Express-down Windows The express-down feature allow the driver and front passenger windows to be lowered without holding the switch. Push the switch down to the second detent, then release, to activate the express-down mode. The express-down mode can be canceled at any time by pulling up on the front of the switch. To open the window partway, push the switch down to the first detent until the window is at the desired position.

GMC Sierra Owner Manual - 2012 - CRC - 11/15/11

Black plate (21,1)

Keys, Doors, and Windows

2-21

Window Lockout

Rear Windows

Power Sliding Rear Window

See Retained Accessory Power (RAP) on page 9‑29 for more