See also:

Dome Lamps
The interior lamps control located in the overhead console controls both the front and rear interior lamps. To operate: (Off): Turns the lamps off. (Door): Turns the lamps on when any ...

Diagnostics
OnStar Vehicle Diagnostics will perform a vehicle check every month. It will check the engine, transmission, antilock brakes, and major vehicle systems. It also checks the tire pressures, if ...

Exterior Lighting Battery Saver
If the exterior lamp button has been left on, the exterior lamps will turn off about 10 minutes after the ignition is turned to LOCK/OFF and a door has been opened. This protects against drainin ...