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:

    Automatic Dimming Mirror
    If the vehicle has the automatic dimming mirror, the driver outside mirror automatically adjusts for the glare of the headlamps from behind. This feature is controlled by the on and off setting on th ...

    Home Page
    The infotainment system displays a home page that makes accessing many of the features an easy process. Back: If on page two of the Home Page, press Back to return to page one of the Home Page. I ...

    Hydraulic Power Steering (3.0L V6 Engine)
    If power steering assist is lost due to a system malfunction, the vehicle can be steered, but may require increased effort. ...