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.

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    Liftgate/Liftglass
    CAUTION: It can be dangerous to drive with the liftgate or liftglass open because carbon monoxide (CO) gas can come into your vehicle. You cannot see or smell CO. It can cause unconsciousness ...

    Emergency Release for Opening Liftgate
    1. Remove the trim plug, located on the inside of the liftgate in the center, to expose the access hole in the trim panel. 2. Use a tool to reach through the access hole in the trim panel. 3. Pry ...

    Removing the Flat Tire and Installing the Spare Tire
    1. Do a safety check before proceeding. See If a Tire Goes Flat for more information. 2. Turn the wheel wrench counterclockwise to loosen the wheel nut caps. If needed, finish loosening th ...