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:

    Instrument Panel Illumination Control
    Instrument Panel Illumination Control The brightness of the instrument panel lighting and steering wheel controls can be adjusted. (Instrument Panel Illumination): Move and hold the thumb ...

    Engine Compartment Fuse Block
    To open the fuse block cover, press the clips at the front and back and rotate the cover up to the side. Notice: Spilling liquid on any electrical component on the vehicle may damage it. Always ...

    Manual Foldaway Mirrors
    These mirrors can be folded inward to prevent damage when going through an automatic car wash. To fold, pull the mirror toward the vehicle. Push the mirror outward to return it to the origin ...