GM Service Manual Online
For 1990-2009 cars only

Your vehicle may have a theft-deterrent system designed to activate an alarm if someone attempts to damage or break into your vehicle. The alarm will sound and the headlamps and turn signal lamps will flash for about one minute. The interior lights will also come on when the interior lamps control is in the door position.

Your vehicle will have one of the following security lights, located on the instrument panel to the left of the steering wheel.


Object Number: 868737  Size: A3

Object Number: 1923029  Size: A3

Arming the System

To arm the system:

  1. Remove the key from the ignition.
  2. The security light will flash when the key is removed from the ignition. See Immobilizer Operation for additional information.

  3. Have all passengers get out of the vehicle.
  4. Close and lock all doors including the liftgate/liftglass with the key or Remote Keyless Entry (RKE) transmitter.
  5. The security light will come on when all doors and liftgate are closed and locked.

    The system will be automatically set after 30 seconds. When the system is set, the security light will flash.

  6. After the security light starts flashing, you may leave the vehicle.
  7. 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 security 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 without using the key or RKE transmitter.
    • If any door or the liftgate/liftglass 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 security 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 security 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.