Security Light

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

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

If the light stays on and the engine does not start, there could be a problem with the theft-deterrent system.

This light is also used to indicate the status of the anti-theft alarm system when the ignition is turned off. The light will flash rapidly if the alarm system is arming and one or more of the monitored entry points is not closed. The light will stay on if the alarm is arming and all entry points are closed.

For information regarding this light and the vehicle's security system, see Anti-theft Alarm System on page 2‑11.

    See also:

    Under the Hood
    The Yukon Hybrid uses a two-mode hybrid system. The system augments the SUV's V-8 engine with two electric motors, both powered by a 300-volt battery pack. A cylinder-deactivation system cuts powe ...

    Dual Automatic Climate Control System
    Dual Automatic Climate Control System A. Driver and Passenger Temperature Controls B. Fan Control C. AUTO D. Defrost E. Air Recirculation F. Outside Air G. Air Delivery Mode Control H. Dis ...

    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 ...