Vehicle and Power Issues

OnStar services require a vehicle electrical system, wireless service, and GPS satellite technologies to be available and operating for features to function properly. These systems may not operate if the battery is discharged or disconnected.

    See also:

    Starter Switch Check
    WARNING When you are doing this inspection, the vehicle could move suddenly. If the vehicle moves, you or others could be injured. 1. Before starting this check, be sure there is enough room aroun ...

    Engine Oil Additives/Engine Oil Flushes
    Do not add anything to the oil. The recommended oils with the dexos specification and displaying the dexos certification mark are all that is needed for good performance and engine protection. En ...

    Center High-Mounted Stoplamp (CHMSL) and Cargo Lamp
    To replace one of these bulbs: 1. Remove the two screws and lift off the lamp assembly. A. Cargo Lamp B. Center High-Mounted Stoplamp (CHMSL) Bulb 2. On the reverse side of the lamp assembly, r ...