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:

    Rear Underseat Fuse Block
    The rear fuse block is located under the rear seat on the driver side. The rear seat cushion must be removed to access the rear fuse block. Removing the Rear Seat Cushion Notice: If you touch th ...

    Climate Control Systems
    Dual Automatic Climate Control System The heating, cooling, and ventilation for the vehicle can be controlled with this system. A. Air Conditioning B. Driver and Passenger Temperature Cont ...

    Locking Rear Axle
    Your vehicle may have this feature. A locking rear axle can give you additional traction on snow, mud, ice, sand or gravel. It works like a standard axle most of the time, but when one of the rear ...