GMC Chevrolet Tahoe 2003 Manual page 116

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.
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 5-109 .
If the alarm does not sound or the vehicle's headlamps
do not flash, the vehicle should be serviced by an
authorized service center.
2-20
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Passlock
Your vehicle is equipped with the
®
Passlock theft-deterrent system.
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Passlock is a passive theft-deterrent system.
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Passlock enables fuel if the ignition lock cylinder is
turned with a valid key. If a correct key is not used or the
ignition lock cylinder is tampered with, fuel is disabled.
If the engine stalls and the security light flashes,
wait until the light stops flashing before trying to restart
the engine. Remember to release the key from
START as soon as the engine starts.
If the engine is running and the security light comes on,
you will be able to restart the engine if you turn the
engine off. However, your Passlock
not working properly and must be serviced by your
dealer. Your vehicle is not protected by Passlock
time. You may also want to check the fuse (see
Fuses and Circuit Breakers on page 5-109 .) See your
dealer for service.
In an emergency, call the GM Roadside Assistance
Center. See Roadside Assistance Program on page 7-6
under Customer Assistance Information.
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system is
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at this