See also:

Exterior Lighting
The exterior lamps control is located on the instrument panel to the left of the steering column. The exterior lamps control has four positions: : Briefly turn to this position to turn the ...

Entering the Feature Settings Menu
1. Turn the ignition on and place the vehicle in P (Park). To avoid excessive drain on the battery, it is recommended that the headlamps are turned off. 2. Press the customization button to scroll ...

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 the v ...