Hummer 2007 H2 Owner's Manual page 117

Here is how to avoid setting off the alarm
by accident:
•
If you do not want to activate the
theft-deterrent system, the vehicle should be
locked with the door key after the doors
are closed.
•
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. The alarm will not stop if you try
to unlock a door any other way.
Testing the Alarm
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 Instrument Panel Fuse Block on page 504
and Underhood Fuse Block on page 507.
If the alarm does not sound or the headlamps do
not flash, the vehicle should be serviced by
your dealer.
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