GM Service Manual Online
For 1990-2009 cars only

If your vehicle has this feature, the theft-deterrent system is designed to activate an alarm if any of the side doors or the liftgate is forcibly unlocked or if the battery terminal is disconnected and then reconnected while the system is set.

The alarm will sound the horn intermittently and flash the headlamps, turn signal lamps and interior lights. If the driver's or front passenger's side doors are unlocked forcibly, the other side doors and the liftgate will be locked automatically.

Arming the System

To arm the system:

  1. Turn the ignition key to the LOCK/OFF position and remove it.
  2. Close and lock all doors and liftgate with the key or Remote Keyless Entry (RKE) transmitter.

  3. Object Number: 868737  Size: A3

    The indicator light located on the instrument panel to the left of the steering wheel will come on when all doors and liftgate are closed and locked.

  4. The system will be automatically set after 30 seconds. When the system is set, the indicator light will start flashing.
  5. After the indicator light starts flashing, you may leave the vehicle.
  6. Do not leave anyone in the vehicle when you set the system, because unlocking the vehicle from the inside will activate the system.

Testing the Alarm

To test the alarm:

  1. Open all the windows.
  2. Set the system as described in the previous procedure. The doors and liftgate should be locked with the key or RKE transmitter. Be sure to wait until the indicator light starts flashing.
  3. Unlock the driver's door from the inside. The system should activate the alarm.
  4. Stop the alarm as described in the disarming procedure following.
  5. Repeat this operation for the other doors. Also check that the system is activated when the battery terminal is disconnected and then reconnected.
  6. If the system does not work properly, have it checked by your dealer/retailer.

How the System Alarm is Activated

The system will activate the alarm:

    • If the driver's or front passenger's door is unlocked or if any of the other doors or the liftgate is forcibly opened without the key or RKE transmitter.
    • If the battery terminal is disconnected and then reconnected.
    • If the ignition is hot-wired.
    • If the side window glass is broken or damaged.

The indicator light will come on when the system is activated.

If the driver's or front passenger's doors are unlocked without using the key or RKE transmitter, the other doors and the liftgate will be automatically locked again.

After one minute the alarm will automatically stop and the indicator light will start flashing again.

Reactivating the System

Once the system is set, it will automatically reset the alarm after the alarm stops. The alarm will activate again under the same conditions as described earlier.

Disarming the System

To disarm the alarm:

    • Turn the ignition key from LOCK/OFF to ON/RUN.
    • Unlock any of the doors with the key or with the RKE transmitter.
        If the liftgate or liftglass is opened with the key, the system will still be activated.

Do not leave the key or device that disarms or deactivates the theft deterrent system in the vehicle.