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:

    If the Off Indicator Is Lit for an Adult-Size Occupant
    If a person of adult-size is sitting in the front outboard passenger seat, but the off indicator is lit, it could be because that person is not sitting properly in the seat. Use the follow ...

    Center Seat
    The vehicle may have a front center seat. This seat can be converted to a storage area by lowering the seatback. See Center Flex Storage Unit. ...

    Replacing Restraint System Parts After a Crash
    WARNING: A crash can damage the restraint systems in your vehicle. A damaged restraint system may not properly protect the person using it, resulting in serious injury or even death in a crash. ...