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:

    Towing the Vehicle
    Notice: To avoid damage, the disabled vehicle should be towed with all four wheels off the ground. Care must be taken with vehicles that have low ground clearance and/or special equipment. Always flat ...

    Turning the System On and Off
    The system can be disabled through the Driver Information Center (DIC). See “Park Assist” under Vehicle Personalization (With DIC Buttons) on page 5‑46 for more information. URPA defaults ...

    Questions and Answers About Safety Belts
    Q: Will I be trapped in the vehicle after a crash if I am wearing a safety belt? A: You could be— whether you are wearing a safety belt or not. Your chance of being conscious during and after a cr ...