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 an Advisor can run a check., and an Advisor can run a check.

    See also:

    Tire Pressure
    Tire pressure is displayed in the DIC for each tire in either kilopascals (kPa) or pounds per square inch (psi). Press the vehicle information button until the DIC displays Front Tire kPa (P ...

    Seat Adjustment
    Power Seats ...

    Dome Lamp Override
    The dome lamp override button is located next to the exterior lamps control. : Press the button in and the dome lamps remain off when a door is opened. Press the button again to return it to the ...