2004 Pontiac GTO Owner's Manual - Page 74

Content Theft-Deterrent Your vehicle has a theft-deterrent alarm system. Arming the System The alarm system is turned on when the LOCK button on the key is pressed. Therefore, locking the doors by pressing LOCK not only locks all the doors but, after a short delay, also sets the alarm system. When the system is armed, the alarm is triggered when any of the doors, hood or trunk are opened or a hot-wire attempted. The alarm system thinks a break-in has occurred. An alarm sounds and the turn signals and dome light will flash. When the alarm system is turned on, you may open the trunk by pressing the trunk symbol button on the key. This does not set off the alarm, but leaves the alarm system on and undisturbed. Closing the trunk re-arms the trunk alarm after a short delay. The LOCK button on the key will not function when the ignition is turned ON or the driver's door is open. Disarming the System To disarm the system, press UNLOCK on the key or turn the ignition to ON. 2-14