GM Service Manual Online
For 1990-2009 cars only

Object Number: 811473  Size: A1

If your vehicle has this feature, the security light is located on the instrument panel cluster.

To activate the theft-deterrent system:

  1. Open the door.
  2. Lock the door with the transmitter. The security light should come on and stay on.
  3. Close all doors. The security light should go off after about 30 seconds. The alarm is not armed until the security light goes off.

If a locked door or trunk is opened without using the key in the driver's door key cylinder or the 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 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 30 seconds, 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 the power door lock switch is used while the door is open or with the 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:

    • Lock the vehicle with the door key after the doors are closed.
    • Always unlock a door with the transmitter. Unlocking a door any other way will set off the alarm.

If you set off the alarm by accident, turn off the alarm by pressing the unlock button on the 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 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 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 Fuses and Circuit Breakers .

If the alarm does not sound or the headlamps do not flash, the vehicle should be serviced by your dealer/retailer.