GM Service Manual Online
For 1990-2009 cars only

The Remote Keyless Entry (RKE) transmitter is used to arm/disarm the theft-deterrent system. Your vehicle's theft-deterrent system can be programmed to three different modes.

Active Arming: The system will arm when the lock button on the RKE transmitter is pressed. The system will disarm when the unlock button is pressed.

Passive Arming: Passive Arming can only be enabled by the retailer. If enabled, the system will arm itself one minute after the ignition is turned off and the driver's door has been opened and closed. If the lock button on the transmitter is pressed before the minute has passed, the system will arm immediately. The system will disarm when the unlock button is pressed.

If you accidentally set off the alarm when entering/exiting the vehicle, you can shut it off by pressing any button on the RKE transmitter other than the panic alarm button.

If you hear three horn chirps when you press the unlock button on the RKE transmitter, this indicates that the alarm was triggered while you were away from your vehicle.