See also:

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. ...

Operation
Full View of Radio with CD Shown, Radio with Six-Disc CD Similar Partial View of Radio with DVD Audio, Hard Drive Device (HDD), and USB The vehicle may have one of these radios as its audio ...

Configure Menu
Press CONFIG to adjust several of the system's features and preferences. The last selected CONFIG screen is the screen that displays: Sound, Radio, Nav (navigation), Display, or Time. ...