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:

    Hydraulic Power Steering
    If your vehicle has hydraulic power steering, it may require maintenance. See Power Steering Fluid (2.4L L4 Engine) or Power Steering Fluid (3.6L V6 Engine). If power steering assist is lost ...

    Jump Starting
    For more information about the vehicle battery, see Battery  If the battery has run down, try to use another vehicle and some jumper cables to start your vehicle. Be sure to use the following st ...

    Trip Information Button
    (Trip Information): Press the trip information button to scroll through the ODOMETER, TRIP A, TRIP B, TIRE PRESSURES, and TIMER. Odometer: Press the trip information button until ODOMETER ap ...