2011 GMC Acadia Owner's Manual - Page 46

2-14 Keys, Doors and Windows If the key is not placed in the ignition and turned to START or the door is not unlocked by pressing Q during the ten second pre-alarm, the alarm goes off. The headlamps flash and the horn sounds for about 30 seconds, then turns off to save the battery power. The vehicle can be started with the correct ignition key if the alarm has been set off. To avoid setting off the alarm by accident: . When the door is closed, the security light stops flashing and stays on solid for approximately 30 seconds. The content theft deterrent alarm is not armed until the security light goes off. If the delayed locking feature is active, the alarm is not activated until all doors are closed and the security light goes off. . Testing the Alarm To test the alarm: 1. From inside the vehicle, lower the driver side window and open the driver door. 2. Press Q. Press Q when the driver door is closed. The security light comes on solid for approximately 30 seconds and then goes off. The content theft deterrent alarm is not armed until the security light goes off. 3. Get out of the vehicle, close the door and wait for the security light to go out. 4. Then reach in through the window, unlock the door with the manual door lock and open the door. This should set off the alarm. If the alarm does not sound when it should, but the vehicle's headlamps flash, check to see if the horn works. The horn fuse may be blown. To replace the fuse, see Fuses and Circuit Breakers on page 10‑32. If the alarm does not sound or the vehicle's headlamps do not flash, see your dealer for service. Lock the vehicle with the door key after the doors are closed. Unlock the door with the RKE transmitter. Unlocking a door any other way sets off the alarm if the system has been armed. . The theft-deterrent system will not activate if the doors are locked with the vehicle's key or the manual door lock. If a locked door is opened without using the RKE transmitter, a ten second pre-alarm occurs. The horn chirps and the lights flash. Press K or place the key in the ignition and turn it to START to turn off the alarm.