Security Light

The immobilizer light should come on briefly as the engine is started. If it

The immobilizer light should come on briefly as the engine is started. If it does not come on, have the vehicle serviced by your dealer. If the system is working normally, the indicator light turns off.

If the light stays on and the engine does not start, there could be a problem with the theft-deterrent system. See Immobilizer Operation on page 2‑14 for more information.

    See also:

    Guidelines
    The RVC system has a guideline overlay that can help the driver align the vehicle when backing into a parking spot. To turn the guidelines on or off: 1. Shift into P (Park). 2. Press the CONFIG b ...

    Engine Air Cleaner/Filter
    If the vehicle has a diesel engine, see “Pickup Models” under “Engine Air Cleaner/Filter” in the Duramax® Diesel Supplement for the correct inspection and replacement procedures. See Engine ...

    Underbody Maintenance
    Use plain water to flush dirt and debris from the vehicle's underbody. Your dealer or an underbody car washing system can do this. If not removed, rust and corrosion can develop. ...