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 vehicle is equipped with the Tire Pressure Monitoring System. If a diagnostics check is needed between e-mails, push OnStar Additional Information , and an Advisor can run a check.

    See also:

    Antilock Brake System (ABS) Warning Light
    This light comes on briefly when the engine is started. If the light does not come on, have it fixed so it will be ready to warn if there is a problem. If the ABS light stays on, turn the ...

    Where Are the Airbags?
    The driver’s frontal airbag is in the middle of the steering wheel. The right front passenger’s frontal airbag is in the instrument panel on the passenger’s side. If your vehicle has a ...

    Folding the Seatback
    Either side of the seatback can be folded down for more cargo space. Fold a seatback only when the vehicle is not moving. Notice: Folding a rear seat with the safety belts still fastened may ...