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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    What to Add
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    Ultrasonic Parking Assist
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    First Engine Oil Change After Every 40 000 km/25,000 Miles
    • Fuel system inspection for damage or leaks. ...