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:

    Electronic Transfer Case
    The transfer case knob is located next to the steering column. Use the dial to shift into and out of four-wheel drive. ...

    Making a Call
    To make a call: 1. Press 5 once or twice (depending on the radio). 2. Enter the phone number. 3. Select Call to start dialing the number. ...

    Protecting Exterior Bright Metal Parts
    Regularly clean bright metal parts with water or chrome polish on chrome or stainless steel trim, if necessary. For aluminum, never use auto or chrome polish, steam, or caustic soap to clean. A coati ...