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:

    Lockout Protection
    If the key is in the ignition and the power door lock switch is used to lock the doors, all doors will lock and then the driver door will unlock. It is always recommended that the ignition key i ...

    Lucerne Super adds more luxury appointments
    Distinctly designed, the Lucerne Super stands out with a new bright chrome waterfall grille, front and rear fascias, integrated dual exhaust tips, rocker panels, and Super badge on the decklid. Ex ...

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