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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    Add-On Electrical Equipment
    Notice: Do not add anything electrical to the vehicle unless you check with your dealer/retailer first. Some electrical equipment can damage the vehicle and the damage would not be covered by th ...

    Ashtrays
    For vehicles with a removable ashtray, the ashtray can be placed into the front console cupholders. To open the ashtray, lift the lid of the ashtray. After using, close the lid. To empty the ashtr ...

    Power Seat Adjustment
    Power Seat Adjustment To adjust a power seat: • Move the seat forward or rearward by sliding the control forward or rearward. • Raise or lower the front or rear part of the seat cushion ...