How does the theft alarm work on a GMC Sierra?
How does the theft alarm work on a GMC Sierra? This is the security light. To arm the theft-deterrent system: 1. Open the door. 2. Lock the door with the Remote Keyless Entry (RKE) transmitter. The security light should flash. If the delayed locking feature is active, the alarm will not be activated until all doors are closed and the security light goes off. Why does my car anti theft system not work? Check the key. The key itself could be the culprit for the anti theft system car wont start. The keys have a built-in chip that sends a...