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:

    Driver Information Center (DIC)
    The vehicle may have a Driver Information Center (DIC). It displays information about the vehicle and warning messages if there is a system problem detected. DIC messages display in the center of ...

    Setting Cruise Control
    If the cruise button is on when not in use, it could get bumped and go into cruise when not desired. Keep the cruise control switch off when cruise is not being used. The cruise control light on the ...

    Verify Minutes and Expiration
    Push and say “minutes” then “verify” to check how many minutes remain and their expiration date. ...