See also:

Obstacle Detection Features
If the liftgate encounters an obstacle during a power open or close cycle, a warning chime will sound and the liftgate will automatically reverse direction to the full closed or open position. Aft ...

Setting the Tone (Bass/Midrange/Treble) (All Except AM-FM Radio and Radio with CD)
BASS/MID/TREB (Bass, Midrange, or Treble): To adjust the bass, midrange, or treble: 1. Press the knob until the tone control tabs display. 2. Highlight the desired tone control tab by doing one of ...

Roadside Assistance Program
U.S.: 1-888-881-3302 TTY Users (U.S.): 1-888-889-2438 Canada: 1-800-268-6800 Mexico: 01-800-466-0801 As the owner of a new GMC, you are automatically enrolled in the Roadside Assistance program. ...