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:

    Keyless Unlocking
    With the RKE transmitter within 1m(3 ft), approach the door and pull the handle to unlock and open the door. If the transmitter is recognized, the door will unlock and open. Entering any door oth ...

    Driving in Mud, Sand, Snow, or Ice
    When you drive in mud, snow, or sand, the wheels will not get good traction. You cannot accelerate as quickly, turning is more difficult, and you will need longer braking distances. It is best t ...

    Perimeter Lighting
    If it is dark enough outside when the unlock button on the remote keyless entry transmitter is pressed, the DRL, parking lamps and back-up lamps will come on. This feature can be programmed on fo ...