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:

    Storing the Flat Tire
    1. Remove the cable package from the jack storage area. 2. Remove the small center cap by tapping the back of the cap with the extension of the shaft, if the vehicle has aluminum wheels. 3. Put the ...

    Tailgate Removal
    The tailgate can be removed to allow for different loading situations. Assistance may be needed with the removal to avoid damage to the vehicle. On vehicles with a Rear Vision Camera, it must be dis ...

    Battery
    This display shows the current battery voltage. If the voltage is in the normal range, the value will display. For example, the display may read BATTERY 13 VOLTS. Your vehicle's charging system regul ...