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:

    Door Ajar Light
    This light comes when a door is open or not securely latched. ...

    Adjustable Safety Belt Comfort Guide
    On vehicles with the adjustable comfort guide, one guide is provided. Additional adjustable comfort guides are available through your dealer To install the adjustable safety belt comfort guide to t ...

    Cruise Control
    Cruise Control The cruise control buttons are located on the steering wheel. Press to turn the cruise control system on and off. An indicator light will turn on or off in the instrument panel clus ...