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:

    Rear Climate Control System (Rear Climate with Rear Seat Audio)
    A. Fan Control B. Air Delivery Mode Control C. Temperature Control For vehicles with the rear climate control system, the controls are located on the rear of the center console. Press the REAR b ...

    Power Mirrors
    Base Model To adjust the mirrors: 1. Press or to select a mirror. 2. Press the control pad to adjust the mirror. 3. Return the switch to the center to deselect the mirror. Uplevel Model T ...

    Four-Wheel-Drive Vehicles
    Use the following procedure to dolly tow a four-wheel-drive vehicle from the rear: 1. Attach the dolly to the tow vehicle following the dolly manufacturer's instructions. 2. Drive the rear wheels on ...