See also:

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. ...

Making a Call
Calls can be made using the following commands: ► Dial ► Digit Dial ► Call ► Re-dial ...

OnStar®
If equipped, this vehicle has a comprehensive, in-vehicle system that can connect to a live Advisor for Emergency, Security, Navigation, Connection, and Diagnostic Services. See OnStar Overview&nb ...