Comments on: Anti-Theft Systems for GM Vehicles

By: Rick

Rick — Sat, 12 Nov 2011 22:19:39 +0000

Obviously the jump start knocked out some electronics. Happens very often these days. Best way to jump start is NOT with jumper cables but with a jumper pack.

By: Kirk

Kirk — Tue, 08 Nov 2011 03:00:18 +0000

2005 Pont Montana SV6 – drained the battery, jumped it, and now Service Theft System error message is displayed. Can’t use factory remote start either, but remote door lock/unlock/open still works.

Ideas?

Thanks!

By: Betty Sydenstricker

Betty Sydenstricker — Wed, 26 Oct 2011 20:12:40 +0000

I have a 2003 Chevrolet Malibu. I drove to my son’s house (about 3 miles) and visited for about 2 hours. I went out to go home and tried to start my car. The anti-theft light started flashing when I turned the key on, the car would not start. How can I disable that anti-theft device and get my car to run without it? I don’t care if the anti-theft device won’t work but I need the car to run. The car has a little over 89,000 miles on it. My son is a mechanic and he put a computer on it and everything else is working fine. Any advice would be appreciated. I am 71 years old and I don’t need to get out and break down somewhere. Thank you

By: Rick

Rick — Sun, 04 Sep 2011 03:09:11 +0000

I'd put in a new passlock cylinder. These things have such a high failure rate (almost 100%) that I'd never trust one from a junk yard. You can buy a brand new one for $66 here

By: Karim Goodwin

Karim Goodwin — Sun, 04 Sep 2011 02:53:21 +0000

I have a 2000 Oldsmobile Silhouette I just purchased. When changing the spark plugs, wires, oil, and starter,…. the car would not start back up. I had a friend who works for GM run a test on it, and the theft deterrent code came up. He told me to replace the pass-lock module on the ignition and I did with one that I got from a junkyard off a 1999 Silhouette. Then did the relearn test and it still wont start. I’m not sure of what to do now and was hoping you have some ideas.

By: james long

james long — Fri, 08 Jul 2011 19:16:01 +0000

I have 95 monte carlo assumed bad cylinder wiring or pass key however I cannot find the 2 white wires as described. Are they connected to the electrical ignition switch harness? I count 8 on ign switch and another 10 on either side of that connector for power windows steroe etc I assume but I do not see the 2 thin white wires anywhere. Any pictures currently I have access to elec switch on column and in process of removing air bag steering wheel to access cylinder for replace.

By: Rick

Rick — Fri, 24 Jun 2011 14:55:32 +0000

You didn’t tell me what vehicle you own or what parts you’ve replaced. If you haven’t fixed the root problem, there’s no way you’re going to get this to start by doing the relearn procedure.

By: Arturo Martinez

Arturo Martinez — Fri, 24 Jun 2011 03:54:16 +0000

I HAVE A SURCURITY LITE TURNED ON AND I HAVR TRIED NUMEROUS TIMES TO TURN ON MY OLDSMOBILE BRAVADA 2002 AND NO LUCK. I HAVE RUN OUT OF EVERY SOLUTION AND IM WONDERING IF MAYBE YOU HAVE ANY NEW INFORMATION THAT YOU CAN INFORM ME OF. I HAVE TRIED A TEN MINUTE SEQUENCE AND START IT FOR ABOUT 40 MINUTES AND NO LUCK THERE. I HAVE ALSO TRIED DISCONNECTING THE BATTERY AND WAITED 2 HOURS TO TRY TO START AND NO LUCK THERE EITHER. I HAVE ALSO LEARNED THAT IT COULD BE DONE WITH A LOCK SMITH AS FAR AS THEM STARING IT FOR ME. BASICALLY WHAT IM ASKING IS IF YOU HAVE ANY OTHER OPTIONS FOR ME TO START MY VEHICLE I WOULD REALLY APPRECIATE IT BY EMAIL. THANKS SO MUCH FOR YOUR TIME.

By: Rocky Okin

Rocky Okin — Wed, 10 Nov 2010 18:32:34 +0000

Rick, I re thought the situation, and think you are correct. Just fix the Passkey System. I am getting power to the injectors, but the computer isn’t switching to ground. By your email, I am assuming that I have either a bad computer, bad passkey box (located behind the breadloaf), bad ignition or bad Theft Deterrent Module. I replaced the ignation, so I assume it is one of the other three. I will have a mechanic check the system per your instructions and go from there.
Rocky

By: Rick

Rick — Sun, 31 Oct 2010 15:54:31 +0000

I assume you’re getting power to the injectors (computer only switches ground on and off). So if computer isn’t switching ground (and the pump is getting power and pumping pressure to the injectors), then you’ve either got a bad computer or you still have a PassKey system problem. The computer MUST see the proper signal from the passkey system or it won’t pulse injector ground. It’s really that simple. Why buy spend the money for a bypass? Why not just fix the passkey system? I don’t get it.