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Theft-deterrent System

Kdog

By Kdog
in Ask A GM Technician

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Kdog Enthusiast

Kdog

Posted
Posted

Either someone is trying to break into my truck or my 2008 Sierra 2500 is doing something quirky. The Theft-Deterrent system has gone off three times in the past week! Each time it has happened it was at night and around the same time (10:00 PM). It happened last Wednesday, Monday and Tuesday. I made it outside last night in less than 30 seconds and found nothing wrong, no one around, the doors locked and no evidence of any tampering! Does anyone know of any reason this would be happening? Other than opening the door, is there any other way to set off the alarm? This whole thing has un-nerved my wife and has her thinking we are under attack from a roving band of thieves stalking our cars and home just waiting for us to make one false move so they can rob us blind!

 

What concerns me is that we have had several thefts on our street in the past two weeks so my wife has reason to feel the way she does!

gm4yrs Enthusiast

gm4yrs

Posted
Posted

I had the factory alarm, go off, but was triggered by an aftermarket alarm, when unlocking by remote. The cause was a loose connection at the unlock wire. The factory alarm is easily bypassed for thieves, look into an alarm with ignition kill, motion, and blinking led on dash.

Kdog Enthusiast

Kdog

Posted
  • Author
Posted

Thanks for the reply. It happened again last night! It has gone off 4 times in the past 8 nights. It went off at midnight last night. I am going to make an appointment at the local GM dealer to get this looked at... I need to do the 10153 safety recall anyways.

  • 4 weeks later...
vryder1 New Member

vryder1

Posted
Posted
Thanks for the reply. It happened again last night! It has gone off 4 times in the past 8 nights. It went off at midnight last night. I am going to make an appointment at the local GM dealer to get this looked at... I need to do the 10153 safety recall anyways.

Kdog I am having the same issue. Alarm goes off randomly usually about 30 min or so after locking the truck. Did you ever get yours fixed? If so what was the issue. Thanks

jdubya Enthusiast

jdubya

Posted
Posted

I had this issue in our shop about a week ago with an older Ford Explorer we were putting an alarm in. The alarm would arm, and then 45 minutes later it would go off. The indicator light indicated that a door was opened when in reality it was not. There was something going on with the electrical system in the vehicle that would send a pulse through the door trigger wire on the vehicle at exactly 45 minutes after it was armed.

 

We spent hours trying to figure out what was wrong with it until we gave up an convinced the customer to let us install pin switches on all of the doors.

 

If your truck is under warranty and this is a factory alarm then I would recommend that you take it to the dealer for service....

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