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:

    Taillamps, Turn Signal, Stoplamps, and Back-Up Lamps
    To replace one of these bulbs: 1. Open the tailgate. See Tailgate on page 2‑10 for more information. 2. Remove the two rear lamp assembly screws near the tailgate latch strikerpost and pull ...

    Brakes
    Brakes stop the vehicle and are crucial to safe driving. • Signs of brake wear may include chirping, grinding, or squealing noises, or difficulty stopping. • Trained dealer technicians have acce ...

    Windows
    Press the front of the switch to lower the window. Pull the switch up to raise it. Pushing or pulling the switch part of the way will open or close the window as long as the switch is operated. ...