Vehicle and Power Issues
OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.
See also:
Horn
To sound the horn, press the center pad on the steering wheel. ...
Transfer Case Buttons
The vehicle will have one of these three styles of transfer case controls. Use these controls to shift into and out of the different Four-Wheel Drive modes.
Manual Transfer Case
This transfer ca ...
Fast Idle System
If the vehicle has this feature it is available only with cruise control.
The manual fast idle switch is operated using the cruise control buttons located on the left hand side of the steering wheel. ...