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:

    All-Wheel Drive
    Vehicles with this feature always send engine power to all four wheels. It is fully automatic, and adjusts itself as needed for road conditions. When using a compact spare tire on an AWD vehicle, t ...

    DVD Distortion
    Video distortion can occur when operating cellular phones, scanners, CB radios, Global Positioning Systems (GPS)*, two-way radios, mobile faxes, or walkie talkies. It might be necessary to turn off ...

    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 c ...