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:

    SERVICE BATTERY CHARGING SYSTEM
    This message is displayed when there is a fault in the battery charging system. Take the vehicle to your dealer for service. ...

    Filling a Portable Fuel Container
    CAUTION: Never fill a portable fuel container while it is in your vehicle. Static electricity discharge from the container can ignite the gasoline vapor. You can be badly burned and your vehicl ...

    Navigation/Radio System
    For vehicles with a navigation radio system, see the separate Navigation System manual. ...