Testing The Alarm - Hummer 2003 H2 Owner's Manual

Here's how to avoid setting off the alarm by accident:
D
If you don't want to activate the theft
system, the vehicle should be locked with the door
key after the doors are closed.
D
Always unlock a door with a key, or use the remote
keyless entry transmitter. Unlocking a door any other
way will set off the alarm.
If you set off the alarm by accident, unlock any door
with the key. You can also turn off the alarm by pressing
unlock on the remote keyless entry transmitter or by
turning on the engine with the correct ignition key.
The alarm won't stop if you try to unlock a door any
other way.
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Testing the Alarm

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deterrent
The alarm can be tested by following these steps:
1. From inside the vehicle, lower the driver's window
and open the driver's door.
2. Activate the system by locking the doors with the
power door lock switch while the door is open, or
with the remote keyless entry transmitter.
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.
While the alarm is set, the power door unlock switch is
not operational.
If the alarm does not sound when it should but the
headlamps flash, check to see if the horn works.
The horn fuse may be blown. To replace the fuse,
see "Fuses and Circuit Breakers" in the Index.
If the alarm does not sound or the headlamps do not
flash, the vehicle should be serviced by your dealer.