See also:

Onstar.com
The website provides access to account information, manages the OnStar subscription, and allows viewing of videos of each service. Get subscription plan pricing and sign up for OnStar Vehicle Diag ...

Center Dome Lamps
There are front and rear dome lamps. The dome lamp controls are located in the overhead console. To change the settings, press the following: : Turns the lamp off, even when a door is open. : ...

Emergency Roof Lamp Provisions
Vehicles with the RPO VYU snow plow prep package also have an emergency roof lamp provision package, RPO TRW. Wiring for the emergency roof lamp is provided above the overhead console. See Auxiliary R ...