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automatIc transmIssIon
IntegrateD traI ler braKe control (Itbc)F
DIesel ex Haust braKe (Diesel Models Only)
F Optional equipment
Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desired for the current driving conditions.
1. Move the shift lever to the Manual (M) position.
2. Press the + (plus) or – (minus) button on the shift lever to select a lower or higher gear. An M and the current gear will be displayed on the Driver Information Center.
The transmission will be limited to the gear selected and lower gears. If vehicle speed is too high or too low for the requested gear, the shift will not occur.
Tow/Haul Mode
The Tow/Haul Mode adjusts the transmission shifts to reduce shift cycling, such as when towing or hauling heavy loads or driving on steep grades.
Press the Tow/Haul Mode button on the end of the shift lever to turn the system on or off.
See Driving and Operating in your Owner Manual.
The ITBC system can be used to adjust the amount of power output, or Trailer Gain, available to the trailer brakes. The control panel is located on the left side of the instrument panel. ITBC information is displayed on the Driver Information Center.
Adjust the Trailer Gain by pressing the +/– adjustment buttons on the control panel.
Squeeze the levers together on the control panel (left lever does not m\
ove) to manually apply the trailer brakes.See Driving and Operating in your Owner Manual.
The engine exhaust brake enhances the vehicle brake system by using engine braking and auto-matically downshifting the transmission, depending on the length of time the brakes are applied, to help slow the vehicle on downhill grades.
Press the Diesel Exhaust Brake button on the center of the instrument panel to turn the system on or off.
See your Duramax Diesel Owner Manual.
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Hill Descent Control sets and maintains vehicle speed from 2–14 mph while descending a steep incline in a forward or reverse gear.
1. Press the Hill Descent Control button on the center of the instrument panel. Vehicle speed must be below 31 mph to enable the system. The Hill Descen\
t Control symbol will illuminate on the instrument cluster.
2. Increase or decrease speed by applying the accelerator or brake pedal. T\
he adjusted speed becomes the new set speed. The symbol flashes when the system is actively applying the brakes to maintain vehicle speed.
See Driving and Operating in your Owner Manual.
HIll Descent controlF (z71)
The traction control system limits wheelspin and the StabiliTrak® stability control system assists with directional control of the vehicle in difficult
driving conditions. Both systems turn on automatically every time the vehicle is started.
Turn off traction control if the vehicle is stuck and rocking the vehicle is required.
Press the Traction Control/StabiliTrak Off button on the center of the instrument panel to turn traction control off or back on. The Traction Control Off light will illuminate on the instrument cluster when the system is off.
See Driving and Operating in your Owner Manual.
tractIon control anD stab IlItraK systems
The Low Tire Pressure warning light on the instrument cluster illuminates when one or more of the vehicle’s tires is significantly underinflated. Fill the tires to the proper tire pressures. The proper tire pressures for the vehicle are listed on the T\
ire and Loading Information label, located below the driver’s door latch. Current tire pressures can be viewed in the Driver Information Center.
Tire pressure is affected by cold weather and distance driven. If the low tire pressure warn-ing light illuminates when the vehicle is first started in cooler temperatures and then turns off as the vehicle is driven, check for the proper tire pressures.
Refer to your Owner Manual for additional information about normal monthly tire maintenance.
See Vehicle Care in your Owner Manual.
tIre Pressure mon Itor (Single Rear Wheel Models Only)
F Optional equipment
