See also:

Multi-Band Antenna
The antenna located on the roof of the vehicle is used for the OnStar, XM Satellite Radio Service System, and GPS (Global Positioning System), if the vehicle has these features. Keep the ant ...

Battery
The battery supplies power to start the engine and operate any additional electrical accessories. - To avoid break–down or failure to start the vehicle, maintain a battery with full cranking ...

Retained Accessory Power (RAP)
The following vehicle accessories can be used for up to 10 minutes after the engine is turned off: Audio System Power Windows OnStar System (if equipped) Sunroof (if equipped) These fea ...