2011 GMC Acadia Owners Manual

while the vehicle is moving forward could damage the transmission. The repairs would not be covered by the vehicle warranty. Shift to R (Reverse) only after the vehicle is stopped. To rock the vehicle back and forth to get out of snow, ice or sand without damaging the transmission, see If the Vehicle is Stuck on page 9‑11.

N (Neutral): In this position, the engine does not connect with the wheels. To restart the engine when the vehicle is already moving, use N (Neutral) only. Also, use N (Neutral) when the vehicle is being towed.

{ WARNING

Shifting into a drive gear while the engine is running at high speed is dangerous. Unless your foot is firmly on the brake pedal, the vehicle could move very rapidly. You could lose control and hit people or objects. Do not shift into a drive gear while the engine is running at high speed.

Notice: Shifting out of P (Park) or N (Neutral) with the engine running at high speed may damage the transmission. The repairs would not be covered by the vehicle warranty. Be sure the engine is not running at high speed when shifting the vehicle.

D (Drive): This position is for normal driving. It provides the best fuel economy. If you need more power for passing, and you are: . Going less than 56 km/h

(35 mph), push the accelerator pedal about halfway down.

. Going about 56 km/h (35 mph) or

more, push the accelerator all the way down.

Notice: If the vehicle seems to accelerate slowly or not shift gears when you go faster, and you continue to drive the vehicle that way, you could damage the transmission. Have the vehicle serviced right away. You can drive in L (Low) when you are driving less than 56 km/h (35 mph) and D (Drive) for higher speeds until then. If the vehicle is stopped on a hill, with your foot off the brake pedal, the vehicle may roll.

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Driving and Operating

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This is normal and is due to the torque converter designed to improve fuel economy and performance. Use the brake to hold the vehicle on a hill. Do not use the accelerator pedal. L (Low): This position gives you access to gear ranges. This provides more engine braking but lower fuel economy than D (Drive). You can use it on very steep hills, or in deep snow or mud.

Manual Mode

Electronic Range Select (ERS) Mode ERS mode allows you to choose the top-gear limit of the transmission and the vehicle's speed while driving down hill or towing a trailer. The vehicle has an electronic shift position indicator within the instrument panel cluster. When using the ERS Mode a number will display next to the L, indicating the current gear that has been selected.

To use this feature: 1. Move the shift lever to L (Low). 2. Press the plus/minus button located on the shift lever, to increase or decrease the gear range available.

When you shift from D (Drive) to L (Low), the transmission will shift to a pre-determined lower gear range. The highest gear available for this pre-determined range is displayed next to the L in the DIC. See Driver Information Center (DIC) (With DIC Buttons) on page 5‑25 or Driver Information Center (DIC) (Without DIC Buttons) on page 5‑30 for more information. The number displayed in the DIC is the highest gear that the transmission will be allowed to operate in. This means that all gears below that number are available. For example, when 4 (Fourth) is shown next to the L, 1 (First) through 4 (Fourth) gears are automatically shifted by the vehicle.

The transmission will not shift into 5 (Fifth) until the + (Plus) button is used or you shift back into D (Drive). While in L (Low), the transmission will prevent shifting to a lower gear range if the engine speed is too high. You have a brief period of time to slow the vehicle. If vehicle speed is not reduced within the time allowed, the lower gear range shift will not be completed. You must further slow the vehicle, then press the − (Minus) button to the desired lower gear range. Automatic Engine Grade braking is not available when the ERS is active. It is available in D (Drive) for both normal and Tow/Haul mode. While using the ERS, cruise control and the tow/haul mode can be used. See Tow/Haul Mode following.

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Driving and Operating

Tow/Haul Mode _ (Tow/Haul): The vehicle may have a Tow/Haul mode. The button is located on the instrument panel under the climate controls. Push the button to activate the system. Push it again to deactivate the system. You can use this feature to assist when towing or hauling a heavy load. When Tow/Haul is activated the Tow/Haul symbol will come on the instrument panel cluster. See “Tow/Haul Mode” under Driving Characteristics and Towing Tips on page 9‑47 for more information.

Automatic Engine Grade Braking Automatic Engine Grade Braking assists when driving on a downhill grade. It maintains vehicle speed by automatically implementing a shift schedule that uses the engine and the transmission to slow the vehicle. The system will automatically command downshifts to reduce vehicle speed, until the brake pedal is no longer being pressed. While in the Electronic Range Select (ERS) mode, grade braking is deactivated, allowing the driver to select a range and limiting the highest gear available. Grade braking is available for normal driving and in Tow/Haul mode. See Automatic Transmission on page 9‑25.

Drive Systems

All-Wheel Drive Vehicles with this feature always send engine power to all four wheels. It is fully automatic, and adjusts itself as needed for road conditions. When using a compact spare tire on an AWD vehicle, the system automatically detects the compact spare and disables AWD. To restore AWD operation and prevent excessive wear on the system, replace the compact spare with a full-size tire as soon as possible. See Compact Spare Tire on page 10‑82 for more information.

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If driving safely on a wet road and it becomes necessary to slam on the brakes and continue braking to avoid a sudden obstacle, a computer senses that the wheels are slowing down. If one of the wheels is about to stop rolling, the computer will separately work the brakes at each wheel. ABS can change the brake pressure to each wheel, as required, faster than any driver could. This can help the driver steer around the obstacle while braking hard. As the brakes are applied, the computer keeps receiving updates on wheel speed and controls braking pressure accordingly. Remember: ABS does not change the time needed to get a foot up to the brake pedal or always decrease stopping distance.

If you get too close to the vehicle in front of you, there will not be enough time to apply the brakes if that vehicle suddenly slows or stops. Always leave enough room up ahead to stop, even with ABS. Using ABS Do not pump the brakes. Just hold the brake pedal down firmly and let ABS work. You might hear the ABS pump or motor operating and feel the brake pedal pulsate, but this is normal. Braking in Emergencies ABS allows the driver to steer and brake at the same time. In many emergencies, steering can help more than even the very best braking.

Brakes

Antilock Brake System (ABS) This vehicle has the Antilock Brake System (ABS), an advanced electronic braking system that helps prevent a braking skid. When the engine is started and the vehicle begins to drive away, ABS checks itself. A momentary motor or clicking noise might be heard while this test is going on, and it might even be noticed that the brake pedal moves a little. This is normal.

If there is a problem with ABS, this warning light stays on. See Antilock Brake System (ABS) Warning Light on page 5‑21.

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Driving and Operating

Parking Brake

To set the parking brake, hold the regular brake pedal down, then push the parking brake pedal down. If the ignition is on, the brake system warning light will come on. See Brake System Warning Light on page 5‑20.

Notice: Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving. To release the parking brake, hold the regular brake pedal down, then push down momentarily on the parking brake pedal until you feel the pedal release. Slowly pull your foot up off the park brake pedal. If the parking brake is not released when you begin to drive, the brake system warning light will be on and a chime will sound warning you that the parking brake is still on. If you are towing a trailer and are parking on a hill, see Driving Characteristics and Towing Tips on page 9‑47.

Brake Assist This vehicle has a brake assist feature designed to assist the driver in stopping or decreasing vehicle speed in emergency driving conditions. This feature uses the stability system hydraulic brake control module to supplement the power brake system under conditions where the driver has quickly and forcefully applied the brake pedal in an attempt to quickly stop or slow down the vehicle. The stability system hydraulic brake control module increases brake pressure at each corner of the vehicle until the ABS activates. Minor brake pedal pulsation or pedal movement during this time is normal and the driver should continue to apply the brake pedal as the driving situation dictates. The brake assist feature will automatically disengage when the brake pedal is released or brake pedal pressure is quickly decreased.

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Ride Control Systems

StabiliTrak® System The vehicle has the StabiliTrak system which combines antilock brake, traction and stability control systems and helps the driver maintain directional control of the vehicle in most driving conditions. When you first start the vehicle and begin to drive away, the system performs several diagnostic checks to ensure there are no problems. The system may be heard or felt while it is working. This is normal and does not mean there is a problem with the vehicle. The system should initialize before the vehicle reaches 32 km/h (20 mph). In some cases, it may take approximately 3.2 km (2 miles) of driving before the system initializes. If the system fails to turn on or activate, one of the following messages will be displayed on the

Driver Information Center (DIC): SERVICE TRACTION CONTROL, SERVICE STABILITRAK, the StabiliTrak light will come on and stay and four chimes are heard. If these conditions are observed, turn the vehicle off, wait 15 seconds, and then turn it back on again to reset the system. If any of these messages still appear on the Driver Information Center (DIC), the vehicle should be taken in for service. For more information on the DIC messages, see Driver Information Center (DIC) (With DIC Buttons) on page 5‑25 or Driver Information Center (DIC) (Without DIC Buttons) on page 5‑30.

The StabiliTrak light will flash on the instrument panel cluster when the system is both on and activated.

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The system may be heard or felt while it is working; this is normal.

The traction control button is located on the instrument panel. The traction control part of StabiliTrak can be turned off by pressing and releasing the traction control button. Traction control can be turned on by pressing and releasing the traction control button and the appropriate TRACTION CONTROL ON message will be displayed, if not automatically shut off for any other reason.

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Driving and Operating

When the traction control system is turned off, the appropriate TRACTION CONTROL OFF message will be displayed on the DIC. The vehicle will still have brake-traction control when traction control is off, but will not be able to use the engine speed management system. See “Traction Control Operation” following for more information. When the traction control system has been turned off, system noises may be heard and felt as a result of the brake-traction control working. It is recommended to leave the system on for normal driving conditions, but it may be necessary to turn the system off if the vehicle is stuck in sand, mud, ice or snow, and you want to “rock” the vehicle to attempt to free it. It may also be necessary to turn off the system when driving in extreme off-road conditions where high wheel spin is required. See If the Vehicle is Stuck on page 9‑11.

Traction Control Operation The traction control system is part of the StabiliTrak system. Traction control limits wheel spin by reducing engine power to the wheels (engine speed management) and by applying the brakes as necessary. The traction control system is enabled automatically when the vehicle is started. It will activate and the StabiliTrak light will flash if it senses that any of the wheels are spinning or beginning to lose traction while driving. If traction control is turned off, only the brake-traction control portion of traction control will work. The engine speed management will be disabled. In this mode, engine power is not reduced automatically and the driven wheels can spin more freely. This can cause the brake-traction control to activate constantly.

Notice: If the wheel(s) of one axle is allowed to spin excessively while the StabiliTrak®, ABS, brake warning lights, and any relevant DIC messages are displayed, the transfer case could be damaged. The repairs would not be covered by the vehicle warranty. Reduce engine power and do not spin the wheel(s) excessively while these lights and messages are displayed. The traction control system may activate on dry or rough roads or under conditions such as heavy acceleration while turning or abrupt upshifts/downshifts of the transmission. When this happens, a reduction in acceleration may be noticed, or a noise or vibration may be heard. This is normal.

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If cruise control is being used when the system activates, the StabiliTrak light will flash and cruise control will automatically disengage. Cruise control may be reengaged when road conditions allow. See Cruise Control on page 9‑33. StabiliTrak may also turn off automatically if it determines that a problem exists with the system. If the problem does not clear itself after restarting the vehicle, see your dealer for service.

Cruise Control With cruise control, a speed of about 40 km/h (25 mph) or more can be maintained without keeping your foot on the accelerator. Cruise control does not work at speeds below about 40 km/h (25 mph). When the brakes are applied, the cruise control is disengaged. { WARNING

Cruise control can be dangerous where you cannot drive safely at a steady speed. So, do not use the cruise control on winding roads or in heavy traffic. Cruise control can be dangerous on slippery roads. On such roads, fast changes in tire traction can cause excessive wheel slip, and you could lose control. Do not use cruise control on slippery roads.

The cruise control buttons are located on left side of the steering wheel. T (On/Off): Press to turn cruise control on and off. The indicator comes on when cruise control is on. + RES (Resume/Accelerate): 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 to make the vehicle decelerate.

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Driving and Operating

[ (Cancel): Press to disengage cruise control without erasing the set speed from memory.

Setting Cruise Control If the cruise button is on when not in use, it could get bumped and go into cruise when not desired. Keep the cruise control switch off when cruise is not being used. The cruise control light on the instrument panel cluster comes on after the cruise control has been set to the desired speed. 1. Press the I button to turn the

cruise control system on.

2. Get up to the speed desired. 3. Press and release the SET–

button located on the steering wheel.

4. Take your foot off the

accelerator.

Resuming a Set Speed If the cruise control is set at a desired speed and then the brakes are applied, the cruise control is disengaged without erasing the set speed from memory. Once the vehicle speed is 40 km/h (25 mph) or greater, press the +RES button on the steering wheel. The vehicle returns to the previously set speed and stays there.

Increasing Speed While Using Cruise Control If the cruise control system is already activated, . Press and hold the +RES button

on the steering wheel until the desired speed is reached, then release it. To increase vehicle speed in small increments, press the +RES button briefly. Each time this is done, the vehicle goes about 1.6 km/h (1 mph) faster.

Reducing Speed While Using Cruise Control If the cruise control system is already activated, . Press and hold the SET– button

on the steering wheel until the lower speed desired is reached, then release it. To slow down in small amounts, press the SET– button briefly. Each time this is done, the vehicle goes about 1.6 km/h (1 mph) slower.

Passing Another Vehicle While Using Cruise Control Use the accelerator pedal to increase vehicle speed. When you take your foot off the pedal, the vehicle will slow down to the previously set cruise speed.

Using Cruise Control on Hills How well the cruise control will work on hills depends upon the vehicle speed, load, and the steepness of the hills.

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Object Detection Systems

Ultrasonic Parking Assist For vehicles with the Ultrasonic Rear Parking Assist (URPA) system, it operates at speeds less than 8 km/h (5 mph), and assists the driver with parking and avoiding objects while in R (Reverse). The sensors on the rear bumper are used to detect the distance to an object up to 2.5 m (8 ft) behind the vehicle, and at least 25.4 cm (10 in) off the ground.

{ WARNING

The Ultrasonic Rear Parking Assist (URPA) system does not replace driver vision. It cannot detect:

. Objects that are below the

bumper, underneath the vehicle, or too close or far from the vehicle.

. Children, pedestrians,

bicyclists, or pets.

If you do not use proper care before and while backing, vehicle damage, injury, or death could occur. Even with URPA, always check behind the vehicle before backing up. While backing, be sure to look for objects and check the vehicle's mirrors.

When going up steep hills, you might have to step on the accelerator pedal to maintain the vehicle speed. When going downhill, you might have to brake or shift to a lower gear to keep the vehicle speed down. When the brakes are applied the cruise control is disengaged.

Ending Cruise Control There are three ways to end cruise control: . Step lightly on the brake pedal.

. Press the [ button.

To turn off the cruise control, press T on the steering wheel.

Erasing Speed Memory The cruise control set speed is erased from memory by pressing the T button or if the ignition is turned off.

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Driving and Operating

How the System Works URPA comes on automatically when the shift lever is moved into R (Reverse). A single tone sounds to indicate the system is working. URPA operates only at speeds less than 8 km/h (5 mph). An obstacle is indicated by audible beeps. The interval between the beeps becomes shorter as the vehicle gets closer to the obstacle. When the distance is less than 30 cm (12 in) the beeps are continuous. To be detected, objects must be at least 25.4 cm (10 in) off the ground and below liftgate level. Objects must also be within 2.5 m (8 ft) from the rear bumper. This distance may be less during warmer or humid weather. The system can be disabled through the Driver Information Center (DIC). See “Park Assist” under Vehicle Personalization (With DIC Buttons) on page 5‑47 for more information.

When the System Does Not Seem to Work Properly If the URPA system does not activate due to a temporary condition, the message PARK ASSIST OFF or PARK ASST BLOCKED SEE OWNERS MANUAL will be displayed on the DIC. SERVICE PARK ASSIST: If this message occurs, take the vehicle to your dealer to repair the system. PARK ASSIST OFF: This message occurs if the driver disables the system. PARK ASST BLOCKED SEE OWNERS MANUAL: This message can occur under the following conditions:

The ultrasonic sensors are not clean. Keep the vehicle's rear bumper free of mud, dirt, snow, ice and slush. For cleaning instructions, see Exterior Care on page 10‑90.

The park assist sensors are covered by frost or ice. Frost or ice can form around and behind the sensors and may not always be seen; this can occur after washing the vehicle in cold weather. The message may not clear until the frost or ice has melted.

. A trailer was attached to the

vehicle, or a bicycle or an object was hanging out of the liftgate during the last drive cycle. Once the attached object is removed, URPA will return to normal operation.

. A tow bar is attached to the

vehicle. The vehicle's bumper is damaged. Take the vehicle to your dealer to repair the system.

. Other conditions may affect

system performance, such as vibrations from a jackhammer or the compression of air brakes on a very large truck.

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Rear Vision Camera (RVC) The vehicle may have a Rear Vision Camera system. Read this entire section before using it.

{ WARNING

The Rear Vision Camera (RVC) system does not replace driver vision. RVC does not:

. Detect objects that are

outside the camera's field of view, below the bumper, or underneath the vehicle.

. Detect children, pedestrians,

bicyclists, or pets.

(Continued)

WARNING (Continued)

Do not back the vehicle by only looking at the RVC screen, or use the screen during longer, higher speed backing maneuvers or where there could be cross-traffic. Your judged distances using the screen will differ from actual distances. If you do not use proper care before backing up, you could hit a vehicle, child, pedestrian, bicyclist, or pet, resulting in vehicle damage, injury, or death. Even though the vehicle has the RVC system, always check carefully before backing up by checking behind and around the vehicle.

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Vehicles Without Navigation System The rear vision camera system is designed to help the driver when backing up by displaying a view of the area behind the vehicle. When the key is in the ON/RUN position and the driver shifts the vehicle into R (Reverse), the video image automatically appears on the inside rear view mirror. Once the driver shifts out of R (Reverse), the video image automatically disappears from the inside rear view mirror.

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Driving and Operating

Turning the Rear Vision Camera System Off or On To turn off the rear vision camera system, press and hold z, located on the inside rearview mirror, until the left indicator light turns off. The rear vision camera display is now disabled. To turn the rear vision camera system on again, press and hold z until the left indicator light illuminates. The rear vision camera system display is now enabled and the display will appear in the mirror normally.

Vehicles With Navigation System The rear vision camera system is designed to help the driver when backing up by displaying a view of the area behind the vehicle. When the driver shifts the vehicle into R (Reverse), the video image automatically appears on the navigation screen. Once the driver shifts out of R (Reverse), the navigation screen will go back to the last screen that had been displayed, after a delay.

Turning the Rear Vision Camera System On or Off To turn the rear vision camera system on or off: 1. Shift into P (Park). 2. Press the MENU button to enter

the configure menu options, then press the MENU hard key to select Display or touch the Display screen button.

3. Select the Rear Camera Options screen button. The Rear Camera Options screen displays.

4. Select the Video screen button. When the Video screen button is highlighted the RVC system is on.

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The delay that is received after shifting out of R (Reverse) is approximately 10 seconds. The delay can be cancelled by performing one of the following: . Pressing a hard key on the

navigation system.

. Shifting in to P (Park). . Reach a vehicle speed of

5 mph (8 km/h).

There is a message on the rear vision camera screen that states “Check Surroundings for Safety”.

Adjusting the Brightness and Contrast of the Screen To adjust the brightness and contrast of the screen, press the MENU button while the rear vision camera image is on the display. Any adjustments made will only affect the rear vision camera screen.

] (Brightness) : Touch the + (plus) or – (minus) screen buttons to increase or decrease the brightness of the screen. _ (Contrast) : Touch the + (plus) or – (minus) screen buttons to increase or decrease the contrast of the screen.

Symbols The navigation system may have a feature that lets the driver view symbols on the navigation screen while using the rear vision camera. The Ultrasonic Rear Park Assist (URPA) system must not be disabled to use the caution symbols. If URPA has been disabled and the symbols have been turned on, the Rear Parking Assist Symbols Unavailable error message may display. See Ultrasonic Parking Assist on page 9‑35.

The symbols appear when an object has been detected by the URPA system. The symbol may cover the object when viewing the navigation screen. To turn the symbols on or off: 1. Make sure that URPA has not

been disabled.

2. Shift into P (Park). 3. Press the MENU hard key

to enter the configure menu options, then press the MENU hard key repeatedly until Display is selected or touch the Display screen button.

4. Select the Rear Camera Options screen button. The Rear Camera Options screen will display. 5. Touch the Symbols screen

button. The screen button will be highlighted when on.

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Driving and Operating

Rear Vision Camera Error Messages Service Rear Vision Camera System: This message can display when the system is not receiving information it requires from other vehicle systems. If any other problem occurs or if a problem persists, see your dealer. Rear Vision Camera Location

The area displayed by the camera is limited and does not display objects that are close to either corner or under the bumper. The area displayed can vary depending on vehicle orientation or road conditions. The distance of the image that appears on the screen differs from the actual distance. The following illustration shows the field of view that the camera provides.

The camera is located above the license plate.

A. View displayed by the camera. B. Corner of the rear bumper.

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When the System Does Not Seem To Work Properly The rear vision camera system might not work properly or display a clear image if:

The RVC is turned off. See “Turning the Rear Camera System On or Off” earlier in this section. It is dark. The sun or the beam of headlights is shining directly into the camera lens. Ice, snow, mud, or anything else builds up on the camera lens. Clean the lens, rinse it with water, and wipe it with a soft cloth.

The back of the vehicle is in an accident, the position and mounting angle of the camera can change or the camera can be affected. Be sure to have the camera and its position and mounting angle checked at your dealer. There are extreme temperature changes.

The rear vision camera system display in the rearview mirror may turn off or not appear as expected due to one of the following conditions. If this occurs the left indicator light on the mirror will flash. . A slow flash may indicate a

loss of video signal, or no video signal present during the reverse cycle.

. A fast flash may indicate that

the display has been on for the maximum allowable time during a reverse cycle, or the display has reached an Over Temperature limit. The fast flash conditions are used to protect the video device from high temperature conditions. Once conditions return to normal the device will reset and the green indicator will stop flashing.

During any of these fault conditions, the display will be blank and the indicator will continue to flash as long as the vehicle is in R (Reverse) or until the conditions return to normal. Pressing and holding z when the left indicator light is flashing will turn off the video display along with the left indicator light.

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Driving and Operating

Gasoline Specifications (U.S. and Canada Only) At a minimum, gasoline should meet ASTM specification D 4814 in the United States or CAN/CGSB‐3.5 or 3.511 in Canada. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). We recommend against the use of gasolines containing MMT. See Fuel Additives on page 9‑43 for additional information.

Fuel Use of the recommended fuel is an important part of the proper maintenance of this vehicle. To help keep the engine clean and maintain optimum vehicle performance, we recommend the use of gasoline advertised as TOP TIER Detergent Gasoline. Look for the TOP TIER label on the fuel pump to ensure gasoline meets enhanced detergency standards developed by auto companies. A list of marketers providing TOP TIER Detergent Gasoline can be found at www.toptiergas.com.

Recommended Fuel Use regular unleaded gasoline with a posted octane rating of 87 or higher. If the octane rating is less than 87, an audible knocking noise, commonly referred to as spark knock, might be heard when driving. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using gasoline rated at 87 octane or higher, the engine needs service.

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California Fuel Requirements If the vehicle is certified to meet California Emissions Standards, it is designed to operate on fuels that meet California specifications. See the underhood emission control label. If this fuel is not available in states adopting California Emissions Standards, the vehicle will operate satisfactorily on fuels meeting federal specifications, but emission control system performance might be affected. The malfunction indicator lamp could turn on and the vehicle might fail a smog‐check test. See Malfunction Indicator Lamp on page 5‑18. If this occurs, return to your authorized dealer for diagnosis. If it is determined that the condition is caused by the type of fuel used, repairs might not be covered by the vehicle warranty.

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Fuels in Foreign Countries Never use leaded gasoline or any other fuel not recommended in the previous text on fuel. Costly repairs caused by use of improper fuel would not be covered by the vehicle warranty. To check the fuel availability, ask an auto club, or contact a major oil company that does business in the country where you will be driving.

Fuel Additives To provide cleaner air, all gasolines in the United States are now required to contain additives that help prevent engine and fuel system deposits from forming, allowing the emission control system to work properly. In most cases, nothing should have to be added to the fuel. However, some gasolines contain only the minimum amount of additive required to meet U.S.

Environmental Protection Agency regulations. To help keep fuel injectors and intake valves clean and avoid problems due to dirty injectors or valves, look for gasoline that is advertised as TOP TIER Detergent Gasoline. Look for the TOP TIER label on the fuel pump to ensure gasoline meets enhanced detergency standards developed by the auto companies. A list of marketers providing TOP TIER Detergent Gasoline can be found at www.toptiergas.com. For customers who do not use TOP TIER Detergent Gasoline regularly, one bottle of GM Fuel System Treatment PLUS, added to the fuel tank at every engine oil change, can help clean deposits from fuel injectors and intake valves. GM Fuel System Treatment PLUS is the only gasoline additive recommended by General Motors. It is available at your dealer.

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Driving and Operating

Some gasolines that are not reformulated for low emissions can contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT); ask the attendant where you buy gasoline whether the fuel contains MMT. We recommend against the use of such gasolines. Fuels containing MMT can reduce spark plug life and affect emission control system performance. The malfunction indicator lamp might turn on. If this occurs, return to your dealer for service.

Gasolines containing oxygenates, such as ethers and ethanol, and reformulated gasolines might be available in your area. We recommend that you use these gasolines, if they comply with the specifications described earlier. However, E85 (85% ethanol) and other fuels containing more than 10% ethanol must not be used in vehicles that were not designed for those fuels. Notice: This vehicle was not designed for fuel that contains methanol. Do not use fuel containing methanol. It can corrode metal parts in the fuel system and also damage plastic and rubber parts. That damage would not be covered under the vehicle warranty.

Filling the Tank

{ WARNING

Fuel vapor burns violently and a fuel fire can cause bad injuries. To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island. Turn off the engine when refueling. Do not smoke near fuel or when refueling the vehicle. Do not use cellular phones. Keep sparks, flames, and smoking materials away from fuel. Do not leave the fuel pump unattended when refueling the vehicle. This is against the law in some places. Do not re-enter the vehicle while pumping fuel. Keep children away from the fuel pump; never let children pump fuel.

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The tethered fuel cap is located behind a hinged fuel door on the driver side of the vehicle. To open the fuel door, push the rearward center edge in and release and it will open.

To remove the fuel cap, turn it slowly counterclockwise. The fuel cap has a spring in it; if the cap is released too soon, it will spring back to the right. While refueling, hang the tethered fuel cap from the hook on the fuel door.

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9-45

This would allow fuel to evaporate into the atmosphere. See Malfunction Indicator Lamp on page 5‑18.

{ WARNING If a fire starts while you are refueling, do not remove the nozzle. Shut off the flow of fuel by shutting off the pump or by notifying the station attendant. Leave the area immediately.

Notice: If a new fuel cap is needed, be sure to get the right type of cap from your dealer. The wrong type of fuel cap might not fit properly, might cause the malfunction indicator lamp to light, and could damage the fuel tank and emissions system. See Malfunction Indicator Lamp on page 5‑18.

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

Be careful not to spill fuel. Do not top off or overfill the tank and wait a few seconds after you have finished pumping before removing the nozzle. Clean fuel from painted surfaces as soon as possible. See Exterior Care on page 10‑90. When replacing the fuel cap, turn it clockwise until it clicks. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly installed.

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9-46

Driving and Operating

Filling a Portable Fuel Container

{ WARNING

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

. Dispense fuel only into

approved containers.

. 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.

(Continued)

WARNING (Continued)

. 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.

. Do not smoke while

pumping fuel.

. Do not use a cellular phone

while pumping fuel.

Towing

General Towing Information Only use towing equipment that has been designed for the vehicle. Contact your dealer or trailering dealer for assistance with preparing the vehicle for towing a trailer. See the following trailer towing information in this section:

For information on driving while towing a trailer, see “Driving Characteristics and Towing Tips.” For maximum vehicle and trailer weights, see “Trailer Towing.” For information on equipment to tow a trailer, see “Towing Equipment.”

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For information on towing a disabled vehicle, see Towing the Vehicle on page 10‑87. For information on towing the vehicle behind another vehicle such as a motor home, see Recreational Vehicle Towing on page 10‑87.

Driving Characteristics and Towing Tips

{ WARNING

The driver can lose control when pulling a trailer if the correct equipment is not used or the vehicle is not driven properly. For example, if the trailer is too heavy, the brakes may not work

(Continued)

WARNING (Continued)

well — or even at all. The driver and passengers could be seriously injured. The vehicle may also be damaged; the resulting repairs would not be covered by the vehicle warranty. Pull a trailer only if all the steps in this section have been followed. Ask your dealer for advice and information about towing a trailer with the vehicle.

The vehicle can tow a trailer when equipped with the proper trailer towing equipment. For trailering capacity, see Trailer Towing on page 9‑52. Trailering changes

Driving and Operating

9-47

handling, acceleration, braking, durability and fuel economy. With the added weight, the engine, transmission, wheel assemblies and tires are forced to work harder and under greater loads. The trailer also adds wind resistance, increasing the pulling requirements. For safe trailering, correctly use the proper trailering equipment. The following information has important trailering tips and rules for your safety and that of your passengers. Read this section carefully before pulling a trailer.

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9-48

Driving and Operating

Pulling a Trailer Here are some important points:

There are many laws, including speed limit restrictions that apply to trailering. Check for legal requirements.

. Consider using sway control.

See Towing Equipment on page 9‑54.

. Do not tow a trailer at all during

the first 800 km (500 miles) the new vehicle is driven. The engine, axle or other parts could be damaged.

. During the first 800 km

(500 miles) that a trailer is towed, do not drive over 80 km/h (50 mph) and do not make starts at full throttle. This reduces wear on the vehicle.

The vehicle can tow in D (Drive). Use a lower gear if the transmission shifts too often. See “Tow/Haul Mode” later in this section.

. Obey speed limit restrictions

when towing a trailer. The vehicle is designed primarily as a passenger and load carrying vehicle. If a trailer is towed, the vehicle will require more frequent maintenance due to the additional load.

Driving with a Trailer Towing a trailer requires experience. Get familiar with handling and braking with the added trailer weight. The vehicle is now longer and not as responsive as the vehicle is by itself. Check all trailer hitch parts and attachments, safety chains, electrical connectors, lamps, tires and mirror adjustments. If the trailer has electric brakes, start the vehicle and trailer moving and then apply the trailer brake controller by hand to be sure the brakes are working. During the trip, check regularly to be sure that the load is secure, and the lamps and trailer brakes are working properly.

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Towing with a Stability Control System When towing, the sound of the stability control system might be heard. The system is reacting to the vehicle movement caused by the trailer, which mainly occurs during cornering. This is normal when towing heavier trailers. Tow/Haul Mode Tow/Haul assists when pulling a heavy trailer or a large or heavy load. The purpose of the Tow/Haul mode is to: . Reduce the frequency and improve the predictability of transmission shifts.

. Provide the same solid shift feel as when the vehicle is unloaded. Improve control of vehicle speed while requiring less throttle pedal activity.

Increase the charging system voltage to assist in recharging a battery installed in a trailer.

Press this button located on the console to turn on and turn off the Tow/Haul mode. See Tow/Haul Mode on page 9‑28. The Tow/Haul light on the instrument panel comes on to indicate that Tow/Haul mode 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.

Driving and Operating

9-49

Tow/Haul is designed to be most effective when the vehicle and trailer combined weight is at least 75 percent of the vehicle's Gross Combined Weight Rating (GCWR). See Trailer Towing on page 9‑52. Tow/Haul is most useful when pulling a heavy trailer or a large or heavy load under the following driving conditions:

Travelling through rolling terrain. Travelling in stop and go traffic. Travelling 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 will not cause damage but there is no benefit. Such a selection when unloaded may result in unpleasant engine and transmission driving characteristics and reduced fuel economy.

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9-50

Driving and Operating

Following Distance Stay at least twice as far behind the vehicle ahead as you would when driving the vehicle without a trailer. This can help to avoid situations that require heavy braking and sudden turns. Passing More passing distance is needed when towing a trailer. Because the rig is longer, it is necessary to go farther beyond the passed vehicle before returning to the lane. Backing Up Hold the bottom of the steering wheel with one hand. To move the trailer to the left, 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.

Making Turns Notice: Making very sharp turns while trailering could cause the trailer to come in contact with the vehicle. The vehicle could be damaged. Avoid making very sharp turns while trailering. When turning with a trailer, make wider turns than normal so the trailer will not strike soft shoulders, curbs, road signs, trees or other objects. Use the turn signal well in advance and avoid jerky or sudden maneuvers. Turn Signals When Towing a Trailer The turn signal indicators on the instrument panel flash whenever signaling a turn or lane change. Properly hooked up, the trailer lamps also flash, telling other drivers the vehicle is turning, changing lanes or stopping.

When towing a trailer, the arrows on the instrument panel flash for turns even if the bulbs on the trailer are burned out. Check occasionally to be sure the trailer bulbs are still working. Driving on Grades Reduce speed and shift to a lower gear before starting down a long or steep downgrade. If the transmission is not shifted down, the brakes might have to be used so much that they would get hot and no longer work well. See “Automatic Engine Grade Braking” within Tow/ Haul Mode on page 9‑28. The vehicle can tow in D (Drive). Use a lower gear if the transmission shifts too often.

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When towing at high altitude on steep uphill grades, engine coolant will boil at a lower temperature than at normal altitudes. If the engine is turned off immediately after towing at high altitude on steep uphill grades, the vehicle may show signs similar to engine overheating. To avoid this, let the engine run while parked, preferably on level ground, with the transmission in P (Park) for a few minutes before turning the engine off. If the overheat warning comes on, see Engine Overheating on page 10‑19. On a long uphill grade, shift down and reduce the vehicle speed to around 88 km/h (55 mph) to reduce the possibility of the engine and the transmission overheating.

Driving and Operating

9-51

Parking on Hills

{ WARNING

Parking the vehicle on a hill with the trailer attached can be dangerous. If something goes wrong, the rig could start to move. People can be injured, and both the vehicle and the trailer can be damaged. When possible, always park the rig on a flat surface.

If parking the rig on a hill: 1. Press the brake pedal, but do not shift into P (Park) yet. Turn the wheels into the curb if facing downhill or into traffic if facing uphill.

2. Have someone place chocks

under the trailer wheels.

3. When the wheel chocks are in place, release the brake pedal until the chocks absorb the load.

4. Reapply the brake pedal. Then

apply the parking brake and shift into P (Park).

5. Release the brake pedal. Leaving After Parking on a Hill 1. Apply and hold the brake pedal

while you:

Start the engine. Shift into a gear. 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.

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9-52

Driving and Operating

Maintenance When Trailer Towing The vehicle needs service more often when pulling a trailer. See this manual's Maintenance Schedule or Index for more information. Things that are especially important in trailer operation are automatic transmission fluid, engine oil, axle lubricant, belts, cooling system and brake system. Inspect these before and during the trip. Check periodically to see that all hitch nuts and bolts are tight. Engine Cooling When Trailer Towing The cooling system may temporarily overheat during severe operating conditions. See Engine Overheating on page 10‑19.

Trailer Towing Three important considerations have to do with weight:

The weight of the trailer The weight of the trailer tongue The total weight on the vehicle's tires

Weight of the Trailer How heavy can a trailer safely be? Speed, altitude, road grades, outside temperature, special equipment, and the amount of tongue weight the vehicle can carry must be considered. See “Weight of the Trailer Tongue” later in this section for more information.

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. Use the following chart to determine how much the vehicle can weigh, based upon the vehicle model and options.

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Vehicle

Maximum Trailer Weight

*GCWR

Driving and Operating

9-53

Front‐Wheel Drive Front‐Wheel Drive, V92 Trailer Towing Package All‐Wheel Drive All‐Wheel Drive, V92 Trailer Towing Package *The Gross Combination Weight Rating (GCWR) is the total allowable weight of the completely loaded vehicle and trailer including any passengers, cargo, equipment and conversions. The GCWR for the vehicle should not be exceeded.

7,500 lbs (3 402 kg) 10,250 lbs (4 649 kg) 7,700 lbs (3 493 kg) 10,450 lbs (4 740 kg)

2,000 lbs (907 kg) 5,200 lbs (2 359 kg) 2,000 lbs (907 kg) 5,200 lbs (2 359 kg)

Ask your dealer for our trailering information or advice. See Customer Assistance Offices (U.S. and Canada) on page 13‑5
or Customer Assistance Offices (Mexico) on page 13‑6 for more information.

Weight of the Trailer Tongue The tongue load (A) of any trailer is an important weight to measure because it affects the total gross weight of the vehicle. The Gross Vehicle Weight (GVW) includes the curb weight of the vehicle, any cargo carried in it, and the people who will be riding in the vehicle. If there are a lot of options,

equipment, passengers or cargo in the vehicle, it will reduce the tongue weight the vehicle can carry, which will also reduce the trailer weight the vehicle can tow. If towing a trailer, the tongue load must be added to the GVW because the vehicle will be carrying that weight, too. See Vehicle Load Limits on page 9‑12.

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9-54

Driving and Operating

GVWR (Gross Vehicle Weight Rating) or the RGAWR (Rear Gross Axle Weight Rating). The effect of additional weight may reduce the trailering capacity more than the total of the additional weight. It is important that the vehicle does not exceed any of its ratings — GCWR, GVWR, RGAWR, Maximum Trailer Rating or Tongue Weight. The only way to be sure it is not exceeding any of these ratings is to weigh the vehicle and trailer. Total Weight on the Vehicle's Tires Inflate the vehicle's tires to the upper limit for cold tires. These numbers can be found on the Certification label or see Vehicle Load Limits on page 9‑12 for more information. Do not go over the GVW limit for the vehicle, or the GAWR, including the weight of the trailer tongue. If using a weight distributing hitch, do not go over the rear axle limit before applying the weight distribution spring bars.

Towing Equipment

Hitches It is important to have the correct hitch equipment. Crosswinds, large trucks going by and rough roads are a few reasons why the right hitch is needed.

The rear bumper on the vehicle is not intended for hitches. Do not attach rental hitches or other bumper-type hitches to it. Use only a frame-mounted hitch that does not attach to the bumper.

. Will any holes be made in the body of the vehicle when the trailer hitch is installed? If there are, then be sure to seal the holes when the hitch is removed. If the holes are not sealed, dirt, water, and deadly carbon monoxide (CO) from the exhaust may get into the vehicle. See Engine Exhaust on page 9‑24.

If a weight-carrying hitch or a weight-distributing hitch is being used, the trailer tongue (A) should weigh 10‐15 percent of the total loaded trailer weight (B). After loading the trailer, weigh the trailer and then the tongue, separately, to see if the weights are proper. If they are not, adjustments might be made by moving some items around in the trailer. Trailering may be limited by the vehicle's ability to carry tongue weight. Tongue weight cannot cause the vehicle to exceed the

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Weight-Distributing Hitches and Weight Carrying Hitches

A. Body-to-Ground Distance B. Front of Vehicle When using a weight-distributing hitch, the hitch must be adjusted so that the distance (A) remains the same both before and after coupling the trailer to the tow vehicle.

Driving and Operating

9-55

Safety Chains Always attach chains between the vehicle and the 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. Always leave just enough slack so the rig can turn. Never allow safety chains to drag on the ground. Trailer Brakes A loaded trailer that weighs more than 450 kg (1,000 lbs) needs to have its own brake system that is adequate for the weight of the trailer. Be sure to read and follow the instructions for the trailer brakes so they are installed, adjusted and maintained properly. Because the vehicle has antilock brakes, do not try to tap into the vehicle's hydraulic brake system. If you do, both brake systems will not work well, or at all.

Trailer Wiring Harness

Basic Trailer Wiring The trailer wiring harness, with a seven-pin connector, is located at the rear of the vehicle and is 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: . Yellow: Left Stop/Turn Signal . Dark Green: Right Stop/Turn

Signal

. Brown: Taillamps . Black: Ground

Light Green: Back-up Lamps

. Red/Black: Battery Feed . Dark Blue: Trailer Brake*

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Driving and Operating

*The fuse for this circuit is installed in the underhood electrical center, but the wires are not connected. They should be connected by your dealer or a qualified service center. If the back-up lamp circuit is not functional, contact your dealer. If a remote (non-vehicle) battery is being charged, press the Tow/Haul mode switch located on the center console near the climate controls. This will boost the vehicle system voltage and properly charge the battery. If the trailer is too light for Tow/Haul mode, turn on the headlamps (Non‐HID only) as a second way to boost the vehicle system and charge the battery.

Electric Trailer Brake Control Wiring Provisions These wiring provisions for an electric trailer brake controller are included with the vehicle as part of the trailer wiring package. The instrument panel contains blunt cut wires behind the steering column for the electric trailer brake controller. The harness contains the following wires: . Red/Black: Power Supply . White: Brake Switch Signal . Gray: Illumination . Dark Blue: Trailer Brake Signal . Black: Ground The electric trailer brake controller should be installed by your dealer or a qualified service center.

Conversions and Add-Ons

Add-On Electrical Equipment Notice: Do not add anything electrical to the vehicle unless you check with your dealer first. Some electrical equipment can damage the vehicle and the damage would not be covered by the vehicle's warranty. Some add-on electrical equipment can keep other components from working as they should. Add-on equipment can drain the vehicle's 12‐volt battery, even if the vehicle is not operating. The vehicle has an airbag system. Before attempting to add anything electrical to the vehicle, see Servicing the Airbag-Equipped Vehicle on page 3‑45 and Adding Equipment to the Airbag-Equipped Vehicle on page 3‑46.

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Vehicle Care

General Information

General Information . . . . . . . . . . 10-2
California Proposition

65 Warning . . . . . . . . . . . . . . . . . 10-3

California Perchlorate

Materials Requirements . . . . 10-3

Accessories and

Modifications . . . . . . . . . . . . . . . 10-3

Vehicle Checks Doing Your Own

Service Work . . . . . . . . . . . . . . . 10-4
Hood . . . . . . . . . . . . . . . . . . . . . . . . 10-5
Engine Compartment

Overview . . . . . . . . . . . . . . . . . . . 10-6
Engine Cover . . . . . . . . . . . . . . . . 10-7
Engine Oil . . . . . . . . . . . . . . . . . . . 10-8
Engine Oil Life System . . . . . 10-11
Automatic Transmission

Fluid . . . . . . . . . . . . . . . . . . . . . . 10-13
Engine Air Cleaner/Filter . . . . 10-13
Cooling System . . . . . . . . . . . . 10-15

Engine Coolant . . . . . . . . . . . . . 10-15
Engine Overheating . . . . . . . . 10-19
Overheated Engine

Protection Operating Mode . . . . . . . . . . . 10-22
Power Steering Fluid . . . . . . . 10-22
Washer Fluid . . . . . . . . . . . . . . . 10-23
Brakes . . . . . . . . . . . . . . . . . . . . . 10-24
Brake Fluid . . . . . . . . . . . . . . . . . 10-25
Battery . . . . . . . . . . . . . . . . . . . . . 10-26
All-Wheel Drive . . . . . . . . . . . . . 10-27
Starter Switch Check . . . . . . . 10-27
Automatic Transmission Shift

Lock Control Function Check . . . . . . . . . . . . . . . . . . . . . 10-28

Ignition Transmission Lock

Check . . . . . . . . . . . . . . . . . . . . . 10-28

Park Brake and P (Park)

Mechanism Check . . . . . . . . 10-28

Wiper Blade

Replacement . . . . . . . . . . . . . . 10-29
Windshield Replacement . . . 10-29

Headlamp Aiming

Headlamp Aiming . . . . . . . . . . 10-30

Vehicle Care

10-1

Bulb Replacement

Bulb Replacement . . . . . . . . . . 10-30
Halogen Bulbs . . . . . . . . . . . . . . 10-30
High Intensity Discharge

(HID) Lighting . . . . . . . . . . . . . 10-30
License Plate Lamp . . . . . . . . 10-31
Replacement Bulbs . . . . . . . . . 10-31

Electrical System

High Voltage Devices and

Wiring . . . . . . . . . . . . . . . . . . . . . 10-31

Electrical System

Overload . . . . . . . . . . . . . . . . . . 10-32

Fuses and Circuit

Breakers . . . . . . . . . . . . . . . . . . 10-32

Engine Compartment Fuse

Block . . . . . . . . . . . . . . . . . . . . . 10-33

Instrument Panel Fuse

Block . . . . . . . . . . . . . . . . . . . . . 10-35

Wheels and Tires

Tires . . . . . . . . . . . . . . . . . . . . . . . . 10-38
Tire Sidewall Labeling . . . . . . 10-39
Tire Designations . . . . . . . . . . . 10-41
Tire Terminology and

Definitions . . . . . . . . . . . . . . . . 10-42

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10-2

Vehicle Care

Tire Pressure . . . . . . . . . . . . . . . 10-45
Tire Pressure Monitor

System . . . . . . . . . . . . . . . . . . . 10-47

Tire Pressure Monitor

Operation . . . . . . . . . . . . . . . . . 10-48
Tire Inspection . . . . . . . . . . . . . . 10-51
Tire Rotation . . . . . . . . . . . . . . . 10-52
When It Is Time for New

Tires . . . . . . . . . . . . . . . . . . . . . . 10-53
Buying New Tires . . . . . . . . . . . 10-54
Different Size Tires and

Wheels . . . . . . . . . . . . . . . . . . . 10-56

Uniform Tire Quality

Grading . . . . . . . . . . . . . . . . . . . 10-57

Wheel Alignment and Tire

Balance . . . . . . . . . . . . . . . . . . . 10-59
Wheel Replacement . . . . . . . . 10-59
Tire Chains . . . . . . . . . . . . . . . . . 10-60
If a Tire Goes Flat . . . . . . . . . . 10-61

General Information For service and parts needs, visit your dealer. You will receive genuine GM parts and GM-trained and supported service people. Genuine GM parts have one of these marks:

Tire Sealant and

Compressor Kit . . . . . . . . . . . 10-63

Storing the Tire Sealant and

Compressor Kit . . . . . . . . . . . 10-70
Tire Changing . . . . . . . . . . . . . . 10-71
Secondary Latch System . . . 10-80
Compact Spare Tire . . . . . . . . 10-82

Jump Starting

Jump Starting . . . . . . . . . . . . . . 10-83

Towing

Towing the Vehicle . . . . . . . . . 10-87
Recreational Vehicle

Towing . . . . . . . . . . . . . . . . . . . . 10-87