2002 Buick Century Owner's Manual - Page 84

Trunk Release Sensor TrapAlert (If Equipped) t System The sensor is designed to open the trunk automatically. If the sensor detects motion and a difference in temperature in the trunk, the sensor will sound the horn if the ignition is in OFF. There will be three short chirps and a pause repeated for up to two minutes. After one minute, the trunk latch will release. If the ignition is not in OFF, the trunk latch will not release automatically and the horn will not sound. To cancel the horn alarm and automatically release the trunk lid before two minutes are up, turn the ignition to ON. Do not cover the sensor with items you put into the trunk or with add-on accessory equipment. If the sensor's field of view is blocked, it will not detect motion and will not function properly. Your vehicle may have a sensor located on the underside of the filler panel inside the trunk. Be sure to secure items in your trunk so that they won't move around and cause the trunk to open. 2-20