2012 GMC Sierra Owner's Manual - Page 167

Instruments and Controls information. When fuel is added this light and message should go off. If it does not, have the vehicle serviced by your dealer. 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. 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. 5-29 Front Fog Lamp Light Security Light For vehicles with fog lamps, this light comes on when the fog lamps are on. The light goes out when the fog lamps are turned off. See Fog Lamps on page 6‑6 for more information. High-Beam On Light This light comes on when the high-beam headlamps are in use. See Headlamp High/Low-Beam Changer on page 6‑3.