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:

    Rocking Your Vehicle to Get It Out
    First, turn the steering wheel left and right. That will clear the area around the front wheels. Then shift back and forth between REVERSE (R) and a forward gear, spinning the wheels as little ...

    Windshield Washer Fluid
    What to Use When the vehicle needs windshield washer fluid, be sure to read the manufacturer’s instructions before use. If the vehicle will be operating in an area where the temperature may fa ...

    Bulb Replacement
    For the proper type of replacement bulbs, see Replacement Bulbs. For any bulb changing procedure not listed in this section, contact your dealer. ...