2014 Chevrolet Silverado Owners Manual

case, and may cause the gears to grind. To avoid causing premature wear, and grinding the gears, do not shift the transfer case into Four-Wheel Drive Low while the vehicle is moving faster than 5 km/h (3 mph).

. Shifting into Four-Wheel Drive

Low should be done, if possible, with the vehicle at a slight roll, 5 km/h (3 mph) or less.

. Shift the transmission into

N (Neutral).

. Shift the transfer case shift lever in one continuous motion into or out of the Four-Wheel Drive Low position.

{ Warning

Shifting the transfer case to N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). You or someone else could be seriously injured. Be sure to set the parking brake before placing the transfer case in N (Neutral). See Parking Brake on page 9-54.

. Shifting into Four-Wheel Drive Low with the vehicle at a stop may be more difficult. You may be unable to complete the shift to Four-Wheel Drive Low, and the transfer case will end up in N (Neutral). This is normal, and is a function of the gear teeth aligning in the transfer case. When this happens, make sure the engine is on, shift the

transmission momentarily to D (Drive) and back to N (Neutral), and then complete the transfer case shift.

. When Four-Wheel Drive Low is engaged, vehicle speed should be kept below 72 km/h (45 mph). Extended high-speed operation in Four-Wheel Drive Low may damage or shorten the life of the drivetrain.

Shifting In or Out of Neutral 1. With the vehicle running and the engine at an idle, set the parking brake.

2. Place the transmission into

N (Neutral).

Shift the transfer case in one continuous motion into or out of the N (Neutral) position.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (45,1)

Electronic Transfer Case

The transfer case knob is next to the steering column. Use the dial to shift into and out of four-wheel drive. Indicator lights show which setting the transfer case is in. Two-Wheel Drive High, Four-Wheel Drive High, and Four-Wheel Drive Low are indicated through the outer ring of the transfer case knob. N (Neutral) is indicated on the face of the knob. The indicator lights will display briefly when you turn on the ignition

Driving and Operating

9-45

and one will stay on. If no lights display, take the vehicle to your dealer for service. If the lights display momentarily when the ignition is in ON/RUN, but none stay on, the knob may have been turned while the vehicle was off. To see the indicator, turn the knob to another position so that it matches the actual transfer case setting. An indicator light flashes while shifting the transfer case and remains illuminated when the shift is complete. If the transfer case cannot make a requested shift, it will return to the last chosen setting. The knob will need to be turned back to the previous transfer case setting in order to see the indicator. Choose among four driving settings: 2 m (Two-Wheel Drive High): This setting is used for driving in most street and highway situations. The front axle is not engaged in two-wheel drive. This setting also provides the best fuel economy.

4 m (Four-Wheel Drive 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. This setting also engages the front axle to help drive the vehicle. This is the best setting to use when plowing snow. 4 n (Four-Wheel Drive Low): This setting also engages the front axle and delivers extra torque. You may never need this setting. It sends maximum power to all four wheels. You might choose Four-Wheel Drive Low while driving off-road in deep sand, deep mud, or deep snow, and while climbing or descending steep hills. Shifting into Four-Wheel Drive Low will turn Traction Control and StabiliTrak off. See Traction Control/ Electronic Stability Control on page 9-56.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

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Driving and Operating

{ Warning

Shifting the transfer case to N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). You or someone else could be seriously injured. Be sure to set the parking brake before placing the transfer case in N (Neutral). See Parking Brake on page 9-54.

N (Neutral): Shift the vehicle's transfer case to N (Neutral) only when towing the vehicle. See Recreational Vehicle Towing on page 10-94 or Towing the Vehicle on page 10-94. If the SERVICE 4WD message stays on, take the vehicle to your dealer for service. See “SERVICE 4WD” under Transmission Messages on page 5-41.

Shifting Into Four-Wheel Drive High Turn the knob to the Four-Wheel Drive High position. This can be done at any speed up to 121 km/h (75 mph), except when shifting from Four-Wheel Drive Low. The indicator light will flash while shifting. It will remain on when the shift is completed.

Shifting Into Two-Wheel Drive High Turn the knob to the Two-Wheel Drive High position. This can be done at any speed, except when shifting from Four-Wheel Drive Low. See “Shifting Out of Four-Wheel Drive Low” later in this section.

Shifting Into Four-Wheel Drive Low When Four-Wheel Drive Low is engaged, vehicle speed should be kept below 72 km/h (45 mph). Extended high-speed operation in Four-Wheel Drive Low may damage or shorten the life of the drivetrain.

To shift to the Four-Wheel Drive Low position, the ignition must be in ON/RUN and the vehicle must be stopped or moving less than 5 km/h (3 mph) with the transmission in N (Neutral). The preferred method for shifting into Four-Wheel Drive Low is to have the vehicle moving 1.6 to 3.2 km/h (1 to 2 mph). Turn the knob to the Four-Wheel Drive Low position. You must wait for the Four-Wheel Drive Low indicator light to stop flashing before shifting the transmission into gear.

{ Caution

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (47,1)

It is typical for the vehicle to exhibit significant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from transfer case N (Neutral) with the engine running. If the knob is turned to the Four-Wheel Drive Low position when the vehicle is in gear and/or moving more than 5 km/h (3 mph), the Four-Wheel Drive Low indicator light will flash for 30 seconds and not complete the shift. After 30 seconds the transfer case will shift to Four-Wheel Drive High mode. In this case, the knob will need to be turned to the Four-Wheel Drive High position in order to see the indicator. With the vehicle moving less than 5 km/h (3 mph), and the transmission in N (Neutral), attempt the shift again.

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Shifting Out of Four-Wheel Drive Low To shift from Four-Wheel Drive Low to Four-Wheel Drive High or Two-Wheel Drive High, the vehicle must be stopped or moving less than 5 km/h (3 mph) with the transmission in N (Neutral) and the ignition in ON/RUN. The preferred method for shifting out of Four-Wheel Drive Low is to have the vehicle moving 1.6 to 3.2 km/h (1 to 2 mph). Turn the knob to the Four-Wheel Drive High or Two-Wheel Drive High position. You must wait for the Four-Wheel Drive High or Two-Wheel Drive High indicator light to stop flashing before shifting the transmission into gear.

{ Caution

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the

(Continued)

Caution (Continued)

transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

It is typical for the vehicle to exhibit significant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from transfer case N (Neutral) with the engine running. If the knob is turned to the Four-Wheel Drive High or Two-Wheel Drive High switch position when the vehicle is in gear and/or moving more than 5 km/h (3 mph), the Four-Wheel Drive High or Two-Wheel Drive High indicator light will flash for 30 seconds, but will not complete the shift. With the vehicle moving

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

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Driving and Operating

less than 5 km/h (3 mph), and the transmission in N (Neutral), attempt the shift again.

Shifting into N (Neutral) To shift the transfer case to N (Neutral): 1. Make sure the vehicle is parked

so that it will not roll.

2. Set the parking brake and press

and hold the regular brake pedal. See Parking Brake on page 9-54.

3. Start the vehicle or turn the

ignition to ON/RUN.

4. Shift the transmission to

N (Neutral).

5. Shift the transfer case to

Two-Wheel Drive High.

6. Turn the transfer case dial

clockwise to N (Neutral) until it stops and hold it there until the N (Neutral) light starts blinking. This will take at least 10 seconds. Then slowly release the dial to the Four-Wheel Drive

7.

Low position. The N (Neutral) light will come on when the transfer case shift to N (Neutral) is complete. If the engine is running, verify that the transfer case is in N (Neutral) by shifting the transmission to R (Reverse) for one second, then shift the transmission to D (Drive) for one second.

8. Turn the ignition to ACC/

ACCESSORY, which will turn the engine off.

9. Place the transmission shift

lever in P (Park).

10. Release the parking brake prior

to moving the vehicle.

11. Turn the ignition to LOCK/OFF.

Shifting Out of N (Neutral) To shift the transfer case out of N (Neutral): 1. Set the parking brake and apply

the regular brake pedal.

2. Turn the ignition to ON/RUN with

the engine off, and shift the transmission to N (Neutral).

3. Turn the transfer case dial to

Two-Wheel Drive High. After the transfer case has shifted out of N (Neutral), the N (Neutral) light will go out.

4. Release the parking brake prior

to moving the vehicle. { Caution

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

5. Start the engine and shift the

transmission to the desired position.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (49,1)

Automatic Transfer Case

The transfer case knob is next to the steering column. Use the dial to shift into and out of four-wheel drive. Indicator lights show which setting the transfer case is in. Two-Wheel Drive High, Automatic Four-Wheel Drive, Four-Wheel Drive High, and Four-Wheel Drive Low are indicated through the outer ring of the transfer case knob. N (Neutral) is indicated on the face of the knob. The indicator lights will display briefly

Driving and Operating

9-49

when you turn on the ignition and one will stay on. If no lights display, take the vehicle to your dealer for service. If the lights display momentarily when the ignition is in ON/RUN, but none stay on, the knob may have been turned while the vehicle was off. To see the indicator, turn the knob to another position so that it matches the actual transfer case setting. An indicator light flashes while shifting the transfer case and remains illuminated when the shift is complete. If the transfer case cannot make a requested shift, it will return to the last chosen setting. The knob will need to be turned back to the previous transfer case setting in order to see the indicator. Choose among five driving settings: 2 m (Two-Wheel Drive High): This setting is used for driving in most street and highway situations. The front axle is not engaged in two-wheel drive. This setting also provides the best fuel economy.

AUTO (Automatic Four-Wheel Drive): This setting is ideal for use when road surface traction conditions are variable. When driving the vehicle in AUTO, the front axle is engaged, and the vehicle's power is sent to the front and rear wheels automatically based on driving conditions. Driving in this mode results in slightly lower fuel economy than Two-Wheel Drive High. Do not use AUTO mode to park on a steep grade with poor traction such as ice, snow, mud or gravel. In AUTO mode only the rear wheels will hold the vehicle from sliding when parked. If parking on a steep grade, use 4 m to keep all four wheels engaged. 4 m (Four-Wheel Drive High): Use this position when extra traction is needed, such as on snowy or icy roads or in most off-road situations. This setting also engages the front

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

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Driving and Operating

axle to help drive the vehicle. This is the best setting to use when plowing snow. 4 n (Four-Wheel Drive Low): This setting also engages the front axle and delivers extra torque. You may never need this setting. It sends maximum power to all four wheels. You might choose Four-Wheel Drive Low if you are driving off-road in deep sand, deep mud, or deep snow, and while climbing or descending steep hills. Shifting into Four-Wheel Drive Low will turn Traction Control and StabiliTrak off. See Traction Control/ Electronic Stability Control on page 9-56.

{ Warning

Shifting the transfer case to N (Neutral) can cause the vehicle to roll even if the transmission is in P (Park). You or someone else

(Continued)

Warning (Continued)

could be seriously injured. Be sure to set the parking brake before placing the transfer case in N (Neutral). See Parking Brake on page 9-54.

N (Neutral): Shift the vehicle's transfer case to N (Neutral) only when towing the vehicle. See Recreational Vehicle Towing on page 10-94 or Towing the Vehicle on page 10-94. If the SERVICE 4WD message stays on, take the vehicle to your dealer for service. See “SERVICE 4WD” under Transmission Messages on page 5-41.

Shifting Into Four-Wheel Drive High or AUTO (Automatic Four-Wheel Drive) Turn the knob to the Four-Wheel Drive High or AUTO position. This can be done at any speed, except when shifting from Four-Wheel

Drive Low. The indicator light will flash while shifting. It will remain on when the shift is completed.

Shifting Into Two-Wheel Drive High Turn the knob to the Two-Wheel Drive High position. This can be done at any speed, except when shifting from Four-Wheel Drive Low. The indicator light will flash while shifting. It will remain on when the shift is completed.

Shifting Into Four-Wheel Drive Low When Four-Wheel Drive Low is engaged, vehicle speed should be kept below 72 km/h (45 mph). Extended high-speed operation in Four-Wheel Drive Low may damage or shorten the life of the drivetrain. To shift to the Four-Wheel Drive Low position, the ignition must be in ON/RUN and the vehicle must be stopped or moving less than 5 km/h (3 mph) with the transmission in N (Neutral). The preferred method

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (51,1)

Driving and Operating

9-51

for shifting into Four-Wheel Drive Low is to have the vehicle moving 1.6 to 3.2 km/h (1 to 2 mph). Turn the knob to the Four-Wheel Drive Low position. You must wait for the Four-Wheel Drive Low indicator light to stop flashing before shifting the transmission into gear.

{ Caution

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

It is typical for the vehicle to exhibit significant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from N (Neutral) with the engine running.

If the knob is turned to the Four-Wheel Drive Low position when the vehicle is in gear and/or moving more than 5 km/h (3 mph), the Four-Wheel Drive Low indicator light will flash for 30 seconds and not complete the shift. After 30 seconds the transfer case will shift to Four-Wheel Drive High mode. In this case, the knob will need to be turned to the Four-Wheel Drive High position in order to see the indicator. With the vehicle moving less than 5 km/h (3 mph), and the transmission in N (Neutral), attempt the shift again.

Shifting Out of Four-Wheel Drive Low To shift from Four-Wheel Drive Low to Four-Wheel Drive High, AUTO, or Two-Wheel Drive High, the vehicle must be stopped or moving less than 5 km/h (3 mph) with the transmission in N (Neutral) and the ignition in ON/RUN. The preferred method for shifting out of Four-Wheel Drive Low is to have the vehicle moving

1.6 to 3.2 km/h (1 to 2 mph). Turn the knob to the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High position. You must wait for the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High indicator light to stop flashing before shifting the transmission into gear. { Caution

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

It is typical for the vehicle to exhibit significant engagement noise and bump when shifting between Four-Wheel Drive Low and Four-Wheel Drive High ranges or from N (Neutral) with the engine running.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (52,1)

9-52

Driving and Operating

If the knob is turned to the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High switch position when the vehicle is in gear and/or moving more than 5 km/h (3 mph), the Four-Wheel Drive High, AUTO, or Two-Wheel Drive High indicator light will flash for 30 seconds but will not complete the shift. With the vehicle moving less than 5 km/h (3 mph), and the transmission in N (Neutral), attempt the shift again.

Shifting into N (Neutral) To shift the transfer case to N (Neutral): 1. Make sure the vehicle is parked

so that it will not roll.

2. Set the parking brake and apply

the regular brake pedal. See Parking Brake on page 9-54.

3. Start the vehicle or turn the

ignition to ON/RUN.

4. Put the transmission in

N (Neutral).

5. Shift the transfer case to

Two-Wheel Drive High.

10. Release the parking brake prior

to moving the vehicle.

6. Turn the transfer case dial

11. Turn the ignition to LOCK/OFF.

clockwise to N (Neutral) until it stops and hold it there until the N (Neutral) light starts blinking. This will take at least 10 seconds. Then slowly release the dial to the Four-Wheel Drive Low position. The N (Neutral) light will come on when the transfer case shift to N (Neutral) is complete. If the engine is running, make sure that the transfer case is in N (Neutral) by shifting the transmission to R (Reverse) for one second, then shift the transmission to D (Drive) for one second.

7.

8. Turn the ignition to ACC/

ACCESSORY, which will turn the engine off.

9. Place the transmission shift

lever in P (Park).

Shifting Out of N (Neutral) To shift out of N (Neutral): 1. Set the parking brake and apply

the regular brake pedal.

2. Turn the ignition to ON/RUN with

the engine off, and shift the transmission to N (Neutral).

3. Turn the transfer case dial to

Two-Wheel Drive High, Four-Wheel Drive High, or AUTO. After the transfer case has shifted out of N (Neutral), the N (Neutral) light will go out.

4. Release the parking brake prior

to moving the vehicle.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (53,1)

Driving and Operating

9-53

{ Caution

Brakes

Shifting the transmission into gear before the requested mode indicator light has stopped flashing could damage the transfer case. To help avoid damaging the vehicle, always wait for the mode indicator lights to stop flashing before shifting the transmission into gear.

5. Start the engine and shift the

transmission to the desired position.

Antilock Brake System (ABS) This vehicle has ABS, an advanced electronic braking system that helps prevent a braking skid. When 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 5-25.

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 you 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

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (54,1)

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Driving and Operating

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 you to steer and brake at the same time. In many emergencies, steering can help more than even the very best braking.

Parking Brake

For vehicles without a release handle, set the parking brake by holding the regular brake pedal down, then pushing down the parking brake pedal. If the ignition is on, the brake system warning light will come on. See Brake System Warning Light on page 5-24.

{ Caution

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 parking brake pedal. If the parking brake is not released when you begin to drive, the brake system warning light will flash 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 9-75.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (55,1)

To release the parking brake, hold the regular brake pedal down. Then pull the bottom edge of the lever with the parking brake symbol, located to the right of the steering column. If the ignition is on when the parking brake is released, the brake system warning light goes off.

{ Caution

Driving with the parking brake on can overheat the brake system and cause premature wear or damage to brake system parts. Make sure that the parking brake is fully released and the brake warning light is off before driving.

If you are towing a trailer and are parking on any hill, see Driving Characteristics and Towing Tips on page 9-75.

Driving and Operating

9-55

Brake Assist The Brake Assist feature is 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.

For vehicles with a release handle, set the parking brake by holding the regular brake pedal down, then pushing down the parking brake pedal. If the ignition is on, the brake system warning light will come on. See Brake System Warning Light on page 5-24. A chime sounds and the warning light flashes when the parking brake is applied and the vehicle is moving at least 8 km/h (5 mph).

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/29/13

Black plate (56,1)

9-56

Driving and Operating

Hill Start Assist (HSA) This vehicle has an HSA feature, which may be useful when the vehicle is stopped on a grade. This feature is designed to prevent the vehicle from rolling, either forward or rearward, during vehicle drive off. After you completely stop and hold the vehicle in a complete standstill on a grade, HSA will automatically activate. During the transition period between when you release the brake pedal and start to accelerate to drive off on a grade, HSA holds the braking pressure for a maximum of two seconds to ensure that there is no rolling. The brakes will automatically release when the

accelerator pedal is applied within the two-second window. If the vehicle is equipped with the Integrated Trailer Brake Control (ITBC) system, HSA may also apply the trailer brakes. It will not activate if the vehicle is in a drive gear and facing downhill or if the vehicle is facing uphill and in R (Reverse). There may be situations on minor hills (less than 5% grade) with a loaded vehicle or while pulling a trailer where HSA will not activate. If you release the brake pedal and then reapply the brake pedal while HSA is activated, the brake pedal typically feels firmer with less pedal travel.

Ride Control Systems

Traction Control/ Electronic Stability Control

System Operation The vehicle has a Traction Control System (TCS) and StabiliTrak®, an electronic stability control system. These systems help limit wheel spin and assist the driver in maintaining control, especially on slippery road conditions. TCS activates if it senses that any of the drive wheels are spinning or beginning to lose traction. When this happens, TCS applies the brakes to the spinning wheels and reduces engine power to limit wheel spin. StabiliTrak activates when the vehicle senses a difference between the intended path and the direction the vehicle is actually traveling. StabiliTrak selectively applies braking pressure to any one of the

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (57,1)

vehicle wheel brakes to assist the driver in keeping the vehicle on the intended path. Trailer Sway Control (TSC) is also on automatically when the vehicle is started. See Trailer Sway Control (TSC) on page 9-98. If cruise control is being used and traction control or StabiliTrak begins to limit wheel spin, cruise control will disengage. Cruise control may be turned back on when road conditions allow. Both systems come on automatically when the vehicle is started and begins to move. The systems may be heard or felt while they are operating or while performing diagnostic checks. This is normal and does not mean there is a problem with the vehicle. It is recommended to leave both systems on for normal driving conditions, but it may be necessary to turn TCS off if the vehicle gets stuck in sand, mud, ice, or snow. See If the Vehicle Is Stuck on

page 9-14 and “Turning the Systems Off and On” later in this section. When the transfer case is in Four-Wheel Drive Low, the stability system is automatically disabled, the StabiliTrak OFF light comes on, and the appropriate message will appear on the DIC. Both traction control and StabiliTrak are automatically disabled in this condition.

The indicator light for both systems is in the instrument cluster. This light will:

Flash when TCS is limiting wheel spin. Flash when StabiliTrak is activated.

Driving and Operating

9-57

Turn on and stay on when either system is not working.

If either system fails to turn on or to activate, a message displays in the Driver Information Center (DIC), and d comes on and stays on to indicate that the system is inactive and is not assisting the driver in maintaining control. The vehicle is safe to drive, but driving should be adjusted accordingly. If d comes on and stays on: 1. Stop the vehicle. 2. Turn the engine off and wait

15 seconds.

3. Start the engine. Drive the vehicle. If d comes on and stays on, the vehicle may need more time to diagnose the problem. If the condition persists, see your dealer.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (58,1)

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Driving and Operating

Turning the Systems Off and On

The button for TCS and StabiliTrak is on the center stack.

{ Caution

Do not repeatedly brake or accelerate heavily when TCS is off. The vehicle driveline could be damaged.

To turn off only TCS, press and release the g button. The traction off light i displays in the instrument cluster. The appropriate message will display in the DIC. See Ride Control System Messages on page 5-39. To turn TCS on again,

press and release the g button. The traction off light i displayed in the instrument cluster will turn off. If TCS is limiting wheel spin when the g button is pressed, the system will not turn off until the wheels stop spinning. To turn off both TCS and StabiliTrak, press and hold the g button until the traction off light i and the StabiliTrak OFF light g come on and stay on in the instrument cluster, then release. The appropriate message will display in the DIC. See Ride Control System Messages on page 5-39. To turn TCS and StabiliTrak on again, press and release the g button. The traction off light i and the StabiliTrak OFF light g in the instrument cluster turn off.

StabiliTrak will automatically turn on if the vehicle exceeds 56 km/h (35 mph). Traction control will remain off. The vehicle has a Trailer Sway Control (TSC) feature and a Hill Start Assist (HSA) feature. See Trailer Sway Control (TSC) on page 9-98 or Hill Start Assist (HSA) on page 9-56. Adding accessories can affect the vehicle performance. See Accessories and Modifications on page 10-3.

Hill Descent Control (HDC) If equipped, HDC can be used when driving downhill. It sets and maintains vehicle speed while descending a very steep incline in a forward or reverse gear. The HDC switch is on the center stack, below the climate controls.

Chevrolet Silverado Owner Manual (GMNA-Localizing-U.S./Canada/Mexico- 5853506) - 2014 - CRC 3rd Edition - 8/28/13

Black plate (59,1)

Press 5 to enable or disable HDC. Vehicle speed must be below 50 km/h (31 mph).

The HDC light displays on the instrument cluster when enabled. HDC can maintain vehicle speeds between 3 and 22 km/h (2 and 14 mph) on an incline greater than or equal to a 10% grade. A blinking HDC light indicates that the system is actively applying the brakes to maintain vehicle speed. When HDC is set, that is the initial set speed. It can be increased or decreased by applying the accelerator or brake pedal. This adjusted speed becomes the new set speed.

Driving and Operating

9-59

HDC will remain enabled between 22 and 60 km/h (14 and 37 mph), however vehicle speed cannot be set or maintained in this range. It will automatically disable if the vehicle speed is above 80 km/h (50 mph) or above 60 km/h (37 mph) for at least 30 seconds. 5
must be pressed again to re-enable HDC. When enabled, if the vehicle is at a speed above 22 km/h (14 mph) and less than 60 km/h (37 mph), a DIC message will display.

Locking Rear Axle Vehicles with a locking rear axle can give more traction on snow, mud, ice, sand, or gravel. It works like a standard axle most of the time, but when traction is low, this feature will allow the rear wheel with the most traction to move the vehicle.

Cruise Control { Warning

Cruise control can be dangerous where you cannot drive safely at a steady speed. 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.

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). If the brakes are applied, the cruise control disengages.

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Driving and Operating

If equipped with an Allison or Hydra-Matic 6-speed automatic transmission, see “Tow/Haul Mode Grade Braking” under Tow/Haul Mode on page 9-38 for an explanation of how cruise control interacts with the Range Selection Mode, Tow/Haul Mode, and Grade Braking systems. If the cruise control is being used and the Traction Control (TCS) system or StabiliTrak begins to limit wheel spin, the cruise control will automatically disengage. See Traction Control/Electronic Stability Control on page 9-56. When road conditions allow the cruise control to be safely used again, it can be turned back on.

5 (On/Off): Press to turn the system on or off. The indicator light is white when cruise control is on and turns off when cruise control is off. +RES (Resume/Accelerate): Press briefly to make the vehicle resume to a previously set speed, or press and hold to accelerate. If cruise control is already active, use to increase vehicle speed.

SET− (Set/Coast): Press briefly to set the speed and activate cruise control. If cruise control is already active, use to decrease vehicle speed. * (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 pressed and go into cruise when not desired. Keep the cruise control button off when cruise is not being used. The cruise control light on the instrument cluster will come on green after the cruise control has been set to the desired speed. 1. Press 5 to turn the cruise

system on.

2. Get up to the desired speed. 3. Press and release the SET− button on the steering wheel.

4. Remove foot from the

accelerator.

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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 reaches about 40 km/h (25 mph) or more, press the +RES button briefly on the steering wheel. The vehicle returns to the previous set speed.

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, briefly press the +RES button. 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 desired lower speed is reached, then release it. To slow down in small increments, briefly press the SET– button. 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 the vehicle speed. When you take your foot off the pedal, the vehicle will slow down to the previous set cruise speed. While pressing the accelerator pedal or shortly following the release to override cruise control, briefly pressing the SET– button will result in cruise control set to the current vehicle speed.

Using Cruise Control on Hills How well the cruise control works on hills depends on the vehicle speed, the load, and the steepness of the hills. When going up steep hills, pressing the accelerator pedal may be necessary to maintain vehicle speed. While going downhill: . Vehicles with a 6-speed

automatic transmission and a gasoline engine have Cruise Grade Braking to help maintain driver selected speed. Cruise Grade Braking is enabled when the vehicle is started and cruise control is active. It is not enabled in Range Selection Mode. It assists in maintaining driver selected speed when driving on downhill grades by using the engine and transmission to slow the vehicle. To disable and enable Cruise Grade Braking for the current ignition key cycle, press and

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Driving and Operating

hold the Tow/Haul button for five seconds. A DIC message displays. See Transmission Messages on page 5-41.

. Vehicles with a diesel engine

have Cruise Grade Braking enabled when Tow/Haul Mode is on, the exhaust brake is on, or both are on.

For other forms of Grade Braking, see Automatic Transmission on page 9-34.Tow/Haul Mode on page 9-38, and Hill Descent Control (HDC) on page 9-58.

Ending Cruise Control There are three ways to end cruise control:

To disengage cruise control, step lightly on the brake pedal. To disengage cruise control, press * on the steering wheel. To turn off the cruise control, press 5 on the steering wheel.

Erasing Speed Memory The cruise control set speed is erased from memory by pressing 5
or if the ignition is turned off.

Driver Assistance Systems This vehicle may have features that work together to help avoid crashes or reduce crash damage while driving, backing, and parking. Read this entire section before using these systems.

{ Warning Do not rely on the Driver Assistance Systems. These systems do not replace the need for paying attention and driving safely. You may not hear or feel alerts or warnings provided by these systems. Failure to use proper care when driving may result in injury, death, or vehicle damage. See Defensive Driving on page 9-3.

(Continued)

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Warning (Continued)

Under many conditions, these systems will not:

. Detect children, pedestrians,

bicyclists, or animals.

. Detect vehicles or objects

outside the area monitored by the system.

. Work at all driving speeds. . Warn you or provide you with enough time to avoid a crash.

. Work under poor visibility or

bad weather conditions.

. Work if the detection sensor is not cleaned or is covered by ice, snow, mud, or dirt. Complete attention is always required while driving, and you should be ready to take action and apply the brakes and/or steer the vehicle to avoid crashes.

Audible or Safety Alert Seat Some driver assistance features alert the driver of obstacles by beeping. To change the volume of the warning chime, see “Comfort and Convenience” under Vehicle Personalization on page 5-44. If equipped with the Safety Alert Seat, the driver seat cushion may provide a vibrating pulse alert instead of beeping. To change this, see “Collision/Detection Systems” under Vehicle Personalization on page 5-44.

Assistance Systems for Parking or Backing When the vehicle is in R (Reverse), the Rear Vision Camera (RVC) and Rear Parking Assist may help the driver to avoid a crash or to reduce crash damage. Some models may also have Front Parking Assist.

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The RVC and Rear Parking Assist will not work properly if the tailgate is down. If the tailgate is down, do not use these systems. When the vehicle is shifted into R (Reverse), the RVC displays an image of the area behind the vehicle in the center stack display. The previous screen displays when the vehicle is shifted out of R (Reverse) after a short delay. To return to the previous screen sooner, press a button on the infotainment system, shift into P (Park), or reach a vehicle speed of 8 km/h (5 mph). { Warning

The RVC system does not display children, pedestrians, bicyclists, animals, or any other object located outside the camera's field of view, below the bumper, or under the vehicle. Perceived distances may be different from actual distances. Do not back the (Continued)

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Warning (Continued)

vehicle using only the RVC screen, during longer, higher speed backing maneuvers, or where there could be cross traffic. Failure to use proper care before backing may result in injury, death, or vehicle damage. Always check behind and around the vehicle before backing.

1. View Displayed by the Camera

1. View Displayed by the Camera 2. Corners of the Rear Bumper Displayed images may be farther or closer than they appear. The area displayed is limited and objects that are close to either corner of the bumper or under the bumper do not display. A warning triangle may display on the RVC screen to show where the Ultrasonic Rear Parking Assist (URPA) has detected an object. This triangle changes from amber to red and increases in size the closer the object. With Rear Park Assist, and if equipped with Front Park Assist, as the vehicle moves at speeds of less

than 8 km/h (5 mph) the sensors on the bumpers detect objects up to 2.5 m (8 ft) behind and 1.2 m (4 ft) in front of the vehicle within a zone 25 cm (10 in) high off the ground and below bumper level. These detection distances may be less during warmer or humid weather.

{ Warning

The parking assist system does not detect children, pedestrians, bicyclists, animals, or objects located below the bumper or that are too close or too far from the vehicle. It is not available at speeds greater than 8 km/h (5 mph). To prevent injury, death, or vehicle damage, even with parking assist, always check the area around the vehicle and check all mirrors before moving forward or backing.

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the front or rear, or both sides of the Safety Alert Seat will pulse five times. Beeps for Front Parking Assist are higher pitched than for Rear Parking Assist. Turning the Features On or Off

The vehicle may have an instrument cluster parking assist display with bars that show “distance to object” and object location information for URPA, and on some vehicles, for the Front Parking Assist system. As the object gets closer, more bars light up. When an object is first detected in the rear, one beep will be heard from the rear, or both sides of the Safety Alert Seat will pulse two times. When an object is very close (<0.6 m (2 ft) in the vehicle rear, or <0.3 m (1 ft) in the vehicle front), a continuous beep will sound from

The X button on the center stack is used to turn on or off the Front and Rear Parking Assist. The indicator light in the button comes on when the features are on and turns off when the features have been disabled. Front and Rear Parking Assist can be turned off, on, or on with towbar through vehicle personalization. See “Parking Assist” under Vehicle Personalization on page 5-44. If the parking assist is turned off through vehicle personalization, the park

assist button on the center stack will be disabled. To turn the parking assist on again, select On in the vehicle personalization menu. The On with Towbar setting allows for the parking assist to work properly with a small item attached to the trailer hitch. Turn off parking assist when towing a trailer. To turn the Rear Vision Camera (RVC) system rear parking assist symbols or guidance lines on or off: 1. On the infotainment system

Home screen, press the Settings screen button, or turn the MENU knob to highlight Settings and press MENU.

2. Select Rear Camera. 3. Press Rear Park Assist Symbols

or Guidance Lines and then select Off or On.

Disconnecting the Rear Vision Camera (RVC) The RVC must be disconnected if the tailgate needs to be removed.

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Driving and Operating

The RVC is disconnected by removing the connector from the electrical junction block mounted on the left side of the cross member of the vehicle frame. After disconnecting, the cap mounted next to the camera connector must be relocated so that the open terminals on the junction block are covered.

Assistance Systems for Driving If equipped, when driving the vehicle, Forward Collision Alert (FCA) and Lane Departure Warning (LDW) can help to avoid a crash or reduce crash damage.

Forward Collision Alert (FCA) System The FCA system may help to avoid or reduce the harm caused by front-end crashes. FCA provides a red flashing alert on the windshield, and beeps or pulses the Safety Alert Seat when approaching a vehicle

directly ahead too quickly. FCA also provides a visual alert if following another vehicle much too closely. FCA detects vehicles within a distance of approximately 60 m (197 ft) and operates at speeds above 40 km/h (25 mph). { Warning

FCA is a warning system and does not apply the brakes. When approaching a slower-moving or stopped vehicle ahead too rapidly, or when following a vehicle too closely, FCA may not provide a warning with enough time to help avoid a crash. FCA does not warn of pedestrians, animals, signs, guardrails, bridges, construction barrels, or other objects. Be ready to take action and apply the brakes. For more information, see Defensive Driving on page 9-3.

Detecting the Vehicle Ahead

FCA warnings will not occur unless the FCA system detects a vehicle ahead. The vehicle ahead indicator will display green when a vehicle is detected in front. Vehicles may not be detected on curves, highway exit ramps, or hills; or due to poor visibility. FCA will not detect another vehicle ahead until it is completely in the driving lane.

{ Warning

FCA does not provide a warning to help avoid a crash, unless it detects a vehicle. FCA may not detect a vehicle ahead if the FCA sensor is blocked by dirt, snow,

(Continued)

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Warning (Continued)

or ice, or if the windshield is damaged. It may also not detect a vehicle on winding or hilly roads, or in conditions that can limit visibility such as fog, rain, or snow, or if the headlamps or windshield are not cleaned or in proper condition. Keep the windshield, headlamps, and FCA sensors clean and in good repair.

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Collision Alert

Tailgating Alert

The vehicle ahead indicator will display amber when you are following a vehicle ahead much too closely. Selecting the Alert Timing

When your vehicle approaches another vehicle too rapidly, six red lights will flash on the windshield. In addition, either eight beeps will sound from the front, or both sides of the Safety Alert Seat will pulse five times.

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Driving and Operating

Press the collision alert button on the steering wheel to set the FCA timing to Far, Medium, Near, or Off. The first button press shows the current setting on the DIC. Additional button presses will change this setting. The chosen setting will remain until it is changed and will affect the timing of both the Collision Alert and the Tailgating Alert features. The timing of both alerts will vary based on vehicle speed. The faster the vehicle speed, the farther away the alert will occur. Consider traffic and weather conditions when selecting the alert timing. The range of selectable alert timing may not be appropriate for all drivers and driving conditions. Unnecessary Alerts FCA may provide unnecessary alerts for turning vehicles, vehicles in other lanes, objects that are not vehicles, or shadows. These alerts are normal operation and the vehicle does not need service.

Cleaning the System If the FCA system does not seem to operate properly, cleaning the outside of the windshield in front of the camera sensor may correct the issue.

Lane Departure Warning (LDW) If equipped, LDW may help avoid crashes due to unintentional lane departures. It may provide a warning if the vehicle is crossing a detected lane marking without using a turn signal in the lane departure direction. LDW uses a camera sensor to detect the lane markings. It only operates at speeds of 56 km/h (35 mph) or greater. When the vehicle crosses a detected lane marking, the LDW indicator will flash and either three beeps will be sounded from the left or right side, or three Safety Alert Seat pulses will occur on the left or right side of the seat, depending on the lane departure direction. LDW

will not warn if the turn signal is on in the departure direction, or if a sharp maneuver is made. { Warning

The LDW system is an aid to help the vehicle stay in the driving lane. It does not steer the vehicle. The LDW system may not:

. Provide enough time to avoid

a crash.

. Detect lane markings under bad weather conditions or if the windshield is dirty.

. Detect lane markings and will

not detect road edges. . Warn that the vehicle is

crossing a lane marking if the system does not detect the lane marking.

If LDW only detects lane markings on one side of the road, it will only warn you when

(Continued)

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Warning (Continued)

departing the lane on the side where it has detected a lane marker. Even with LDW, always keep your attention on the road and maintain proper vehicle position within the lane, or vehicle damage, injury, or death could occur. Always keep the windshield clean and do not use LDW in bad weather conditions.

How the System Works The LDW camera sensor is on the windshield ahead of the rearview mirror. To turn LDW on and off, press @ on the center stack. The control indicator will light when LDW is on.

When the vehicle is started, the LDW indicator on the instrument cluster will come on briefly. If LDW is on, the LDW indicator will appear green if the system detects a left or right lane marking while the vehicle is traveling at 56 km/h (35 mph) or greater. If the vehicle crosses a detected lane marking without using the turn signal in the lane departure direction, this indicator will change to amber and flash. In addition, three beeps will be sounded from the left or right side, or the Safety Alert Seat will pulse three times on either the left or right side of the seat, depending on the lane departure direction.

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When the System Does Not Seem to Work Properly If the LDW symbol does not appear when the system is on and the vehicle is traveling at least 56 km/h (35 mph):

The lane markings on the road may not be seen. The camera sensor may be blocked by dirt, snow, or ice. The windshield may be damaged. The weather may be limiting visibility.

This is normal operation; the vehicle does not need service. Clean the windshield. Lane markings may not be detected on curves, highway exit ramps, or hills; or due to poor visibility. If the LDW camera system does not seem to operate properly, cleaning the outside of the windshield in front of the camera sensor may correct the issue.

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Driving and Operating

Fuel For diesel engine vehicles, see “Fuel for Diesel Engines” in the Duramax diesel supplement. For gasoline engine vehicles, use of the recommended fuel is an important part of the proper maintenance of this vehicle. When driving in the U.S., to help keep the engine clean and maintain optimum vehicle performance, we recommend using TOP TIER Detergent Gasolines. See www.toptiergas.com for a list of TOP TIER Detergent Gasolines.

{ Warning

LDW does not provide a warning to help avoid a crash, unless it detects the lane markings. LDW may not detect the lane markings if the camera sensor is blocked by dirt, snow, or ice, or if the windshield is damaged. It may also not detect a lane on winding or hilly roads, or in conditions that can limit visibility such as fog, rain, or snow, or if the headlamps or windshield are not cleaned or in proper condition. Keep the windshield, headlamps, and camera sensors clean and in good repair.

LDW warnings may occur due to tar marks, shadows, cracks in the road, or other road imperfections. This is normal system operation; the vehicle does not need service.

If the vehicle has a yellow fuel cap, E85 or FlexFuel can be used in the vehicle. See E85 or FlexFuel on page 9-72. For all vehicles except those with the 6.2L V8 engine, 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 may be heard. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. If heavy knocking is heard when using a higher octane rated gasoline, the engine needs service.

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If the vehicle has the 6.2L V8 engine (VIN Code J), use premium unleaded gasoline with a posted octane rating of 91 or higher. Regular unleaded gasoline rated at 87 octane or higher can be used, but acceleration could be reduced, and an audible knocking noise may be heard. If the octane is less than 87, a heavy knocking noise may be heard. If this occurs, use a gasoline rated at 87 octane or higher as soon as possible. Otherwise, the engine could be damaged. If heavy knocking is heard when using gasoline with a higher octane rating, the engine needs service.

Use of Seasonal Fuels Use summer and winter fuels in the appropriate season. Driving or starting could be affected if the incorrect fuel is used. Drive the vehicle with the engine running until the fuel is a half tank or less, then refuel with the current seasonal fuel.

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Prohibited Fuels Gasolines containing oxygenates, such as ethers and ethanol, as well as reformulated gasolines are available in some cities. If these gasolines comply with the previousely described specification, then they are acceptable to use. However, E85 (85% ethanol) and other fuels containing more than 15% ethanol must be used only in flex fuel vehicles.

{ Caution

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.

Some gasolines that are not reformulated for low emissions can contain an octane-enhancing additive called

methylcyclopentadienyl manganese tricarbonyl (MMT). Do not use gasolines with MMT as they can reduce spark plug life and affect emission control system performance. The malfunction indicator lamp may turn on. If this occurs, see your dealer for service.

Gasoline Specifications At a minimum, gasoline should meet ASTM specification D 4814. Some gasolines contain an octane-enhancing additive called methylcyclopentadienyl manganese tricarbonyl (MMT). We recommend against the use of gasolines containing MMT. See “Prohibited Fuels" in Fuel on page 9-70.

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

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Driving and Operating

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 may not pass a smog-check test. See Malfunction Indicator Lamp on page 5-21. 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 may not be covered by the vehicle warranty.

Fuels in Foreign Countries If planning to drive in countries outside the U.S. or Canada, the proper fuel might be hard to find. Check regional auto club or fuel retail brand websites for availability in the country where driving. Never use leaded gasoline, fuel containing methanol, or any other fuel not recommended. Costly repairs

caused by use of improper fuel would not be covered by the vehicle warranty.

Fuel Additives To keep fuel systems clean, TOP TIER Detergent Gasoline is recommended. See Fuel on page 9-70. If TOP TIER Detergent Gasoline is not available, one bottle of Fuel System Treatment PLUS, part number 88861013, added to the fuel tank at every engine oil change, can help. Fuel System Treatment PLUS is the only gasoline additive recommended by General Motors. It is available at your dealer. Do not use additives with E85 or FlexFuel.

E85 or FlexFuel Vehicles with a yellow fuel cap can use either unleaded gasoline or fuel containing up to 85% ethanol (E85).

All other vehicles should use only the unleaded gasoline as described in Fuel on page 9-70. The use of E85 or FlexFuel is encouraged when the vehicle is designed to use it. E85 or FlexFuel is made from renewable sources. To help locate fuel stations that carry E85 or FlexFuel, the U.S. Department of Energy has an alternative fuels website. See www.afdc.energy.gov/afdc/locator/ stations. E85 or FlexFuel should meet ASTM Specification D 5798 or CAN/ CGSB–3.512 in Canada. Do not use the fuel if the ethanol content is greater than 85%. Fuel mixtures that do not meet ASTM or CGSB specifications can affect driveability and could cause the malfunction indicator lamp to come on. After refueling, the vehicle calculates the composition of the fuel. It is not recommended to repeatedly switch between fuels. If fuels are switched frequently, add

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as much fuel as possible and do not add less than 11 L (3 gal) when refueling. Drive at least 11 km (7 mi) immediately after refueling to allow the vehicle to adapt to the change in ethanol concentration. Because E85 or FlexFuel has less energy per liter (gallon) than gasoline, the vehicle will need to be refilled more often. See Filling the Tank on page 9-73.

{ Caution Some additives are not compatible with E85 or FlexFuel and can harm the vehicle's fuel system. Do not add anything to E85 or FlexFuel. Damage caused by additives would not be covered by the vehicle warranty.

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9-73

{ Caution

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 If the vehicle has a diesel engine, see the Duramax diesel supplement for more information.

{ Warning

Fuel vapors and fuel fires burn violently and can cause injury or death.

. To help avoid injuries to you and others, read and follow all the instructions on the fuel pump island.

(Continued)

Warning (Continued)

. Turn off the engine when

refueling.

. Keep sparks, flames, and

smoking materials away from fuel.

. Do not leave the fuel pump

unattended.

. Do not reenter the vehicle

while pumping fuel.

. Keep children away from the

fuel pump and never let children pump fuel.

. Fuel can spray out if the fuel

cap is opened too quickly. 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.

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Driving and Operating

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 10-96. When replacing the fuel cap, turn it clockwise until it clicks. It will require more effort to turn the fuel cap on the last turn as you tighten it. Make sure the cap is fully installed. The diagnostic system can determine if the fuel cap has been left off or improperly installed. This would allow fuel to evaporate into the