2007 GMC Envoy Owner's Manual - Page 111

To avoid setting off the alarm by accident, do the following: • Always lock the vehicle using the door key after the doors are closed. • Always unlock a door with a key, or use the RKE 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 RKE transmitter. The alarm will not stop if you try to unlock a door any other way. When the alarm is set the power door unlock switch will not work. 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 on page 493. If the alarm does not sound or the headlamps do not flash, the vehicle should be serviced by your dealer. Passlock® Your vehicle has the Passlock® theft-deterrent system. Passlock® is a passive theft-deterrent system that 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 has been tampered with, the fuel system is disabled and the vehicle will not start. During normal operation, the security light will turn off about five seconds after the key is turned to RUN. Testing the Alarm To test the alarm, do the following: 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 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. 111