See also:

Automatic Dimming Rearview Mirror with OnStar® and Compass
Your vehicle may have an automatic-dimming rearview mirror with a compass and the OnStar® system. There are three additional buttons for the OnStar® system. See your dealer for more informatio ...

SERVICE BRAKE ASSIST
This message may be displayed when there is a problem with the brake boost assist system. When this message is displayed, the brake boost assist motor might be heard operating and you might ...

Adjusting the Volume
Turn the VOL/ knob to adjust the volume of the infotainment system after the volume level has been set on the portable audio device. ...