Chevrolet Silverado 2007 Owner's Manual page 136

If a locked door is opened without using the
key in the driver's door key cylinder or the RKE
transmitter, a ten second pre-alarm will occur.
The horn will chirp and the lights will flash. If the
key is not placed in the ignition and turned to
START or the door is not unlocked by pressing
the unlock button on the RKE transmitter during the
ten second pre-alarm, the alarm will go off. Your
vehicle's headlamps will flash and the horn will
sound for about two minutes, then will turn off to
save the battery power.
The theft-deterrent system will not activate if the
doors are locked with the vehicle's key or the
manual door lock. It activates only if you use the
power door lock switch with the door open or
the RKE transmitter. You should also remember
that you can start your vehicle with the correct
ignition key if the alarm has been set off.
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 the RKE transmitter.
Unlocking a door any other way will set off the
alarm if the system has been armed.
136
If you set off the alarm by accident, turn off the
alarm by pressing unlock on the RKE transmitter or
by placing the key in the ignition and turning it
to START.
Testing the Alarm
To test the alarm:
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 RKE 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 618.
If the alarm does not sound or the vehicle's
headlamps do not flash, see your dealer/retailer
for service.