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:

    Passenger Safety Belt Reminder Light
    When the vehicle is started, this light flashes and a chime may come on to remind front passengers to fasten their safety belt. Then the light stays on solid until the belt is buckled. For more ...

    Changing a Flat Tire
    If a tire goes flat, avoid further tire and wheel damage by driving slowly to a level place. Turn on your vehicle’s hazard warning flashers. CAUTION: Changing a tire can be dangerous. The veh ...

    Safety Locks
    The rear door safety locks prevent passengers from opening the rear doors from inside the vehicle. Press to activate the safety locks. The indicator light will illuminate. This switch also di ...