OnStar Services

See also:

Service All-Wheel Drive Light
This light should come on briefly when you turn on the ignition, as a check to show you it is working. The service all-wheel drive light comes on to indicate that there may be a problem with ...

Power Lumbar
Your vehicle has power lumbar on the driver’s and front passenger’s seats. The seatback lumbar support can be adjusted by moving the control located on the outboard side of the seat cushi ...

Front Fog Lamps
For vehicles with front fog lamps, the button is located on the outboard side of the instrument panel. The ignition must be on to turn on the fog lamps. (Front Fog Lamps): Press to turn the f ...