Pontiac 2004 GTO - 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.
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