See also:

Your Responsibility
Increase the volume of the radio if the OnStar Advisor cannot be heard. If the light next to the OnStar buttons is red, the system may not be functioning properly. Push and request a vehicle diagnos ...

Audio Source
VOL/ (Volume/Power): 1. Press to turn the radio on or off. 2. Turn to increase or decrease the volume of the active source (i.e., current audio source, active navigation voice guidance, or ...

Brake Adjustment
Every time the brakes are applied, with or without the vehicle moving, the brakes adjust for wear. ...