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Automatic Transmission
Integrated Trailer Brake Control (ITBC)F
Range Selection Mode
Range Selection Mode allows the driver to select the range of gears desired for the cur-rent driving conditions.
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 instru-ment panel. ITBC information is displayed on the Driver Information Center.
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. When towing, use the Tow/Haul Mode to prevent damage to the engine or transmission.
Press the Tow/Haul Mode button on the end of the shift lever to turn the system on or off.
GMC Trailering Guide App
The free trailering guide app includes maximum trailer weight ratings by model along with trailering information on hitches and equipment, GMC trailering technologies, safe trailering techniques and more. Currently available for the iPad®, download the mobile app from the iPad’s app store.
See Driving and Operating in your Owner Manual.
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 move) to manually apply the trailer brakes.
See Driving and Operating in your Owner Manual.
F Optional equipment
