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.

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    Folding Mirrors
    For vehicles with manual folding mirrors, push the mirror toward the vehicle. Pull the mirror out to return to its original position. For vehicles with power folding mirrors: 1. Press (A) to fold ...

    When to Check
    Check the tires once a month or more. Do not forget the spare tire, if the vehicle has one. SeeFull-Size Spare Tire on page 10‑91 for additional information. ...

    Fog Lamps
    To replace one of these bulbs: 1. Locate the fog lamp assembly under the front facia. 2. Disconnect the bulb socket from the electrical connector, turn, and pull out the bulb assembly. 3. Remov ...