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:

    Brake Fluid
    The brake master cylinder reservoir is filled with DOT 3 brake fluid as indicated on the reservoir cap. See Engine Compartment Overview for the location of the reservoir. There are only two ...

    Dual Mode
    This dual screen symbol displays when the screen is in dual mode. Dual mode displays the route on half of the screen and a maneuver or Interstate Exit list on the other half. The Interstate Exit ...

    Dolly Towing (All-Wheel-Drive Vehicles)
    Notice: Towing an all-wheel-drive vehicle with all four wheels on the ground, or even with only two of its wheels on the ground, will damage drivetrain components. Do not tow an all-wheel-d ...