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:

    Windshield Wiper/Washer
    Windshield Wiper/Washer The windshield wiper lever is on the right side of the steering column. With the ignition in ACC/ACCESSORY or ON/RUN, move the windshield wiper lever to select the wi ...

    Fuel System Messages
    FUEL LEVEL LOW This message displays when the vehicle is low on fuel. Refuel as soon as possible. TIGHTEN GAS CAP This message displays when the fuel cap is not on tight. Tighten the fuel c ...

    Vehicle Data Recording and Privacy
    This GM vehicle has a number of sophisticated computers that record information about the vehicle’s performance and how it is driven. For example, the vehicle uses computer modules to monitor and c ...