Question about 1997 Cadillac DeVille

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Anti theft devise is keeping me from putting in new ignition switch. how do i change or fix this? 1997 cadillac deville/northstar

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You have to take the new ignition switch alone with your registration and the car to your Cadillac dealer and they will explain how ,and how much it will be, to re code and reprogram your p.c.m. so it will recognize the new switch. good luck to u, hope we helped!

Posted on Mar 09, 2009

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Dec 29, 2015 | Cadillac Cars & Trucks

1 Answer

Theft mode light


Has anyone changed the part of the ignition switch that reads the key value and sends it to the anti-theft module, it this part malfunctions it will lock you out, and you will be unable to start the car, they are a known fault for all GM lines with factory anti-theft systems, it is part of the ignition switch, but I believe that it alone can be replaced, call your local dealer and ask about the sensor for the VATS key in the ignition, they should know what the part is formally called.

Sep 29, 2008 | 1999 Cadillac DeVille

1 Answer

Anti-theft system will not allow car to start - how do you unlock the anti-theft


if the theft light is was flashing on you, put the key in the ignition and turn all the way until the instrument cluster lights up, just don't start the car. leave it like that for aprox. 10 min. or until light goes out. when that happens, turn of(don't take out keys) and try to start car. hope it works.

Jul 03, 2010 | 1997 Cadillac DeVille

1 Answer

How can i fix this problem anti theft problem,


the problem is either the key or it is the pick up in the ignition switch that reads the chip in the neck of the key. a resistor can be installed to bypass security key. We do that often

Aug 30, 2009 | 1999 Cadillac DeVille

1 Answer

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Read your manual or take it to the dealer. It sounds like it needs reset.....if this is a factory anti theft system, only the installer may be able to help you.

Jul 16, 2009 | 1997 Cadillac DeVille

1 Answer

I put a new ignition switch ,and the car dont want to start


U must have the Anti-Theft module reprogrammed to recognize the new key code, the dealer must do this with a GM electronic scan tool.

Jun 07, 2009 | 1996 Cadillac DeVille

2 Answers

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I had the same problem. trying to save money i took it to several auto places who thought they could fix it..... after a lot of money and my 800.00 after market alarm was taken off i had it took to the dealer . They fix it in two hours they put in new switch and key haven't had any problems sence.

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3 Answers

1997 cadillac deville anti theft system comes on and i cant get my car started. Same exact problem just with a 1996 DeVille. I would imagine that this problem applies for most Cadillac's all around the...


I'm having the same problem, in research I have been told I need a new ignithion switch and or key. Ignition switch is not an easy thing to replace, The air bag must be disabled and that is a proccess discribed in another Solve, you should look further on this sight for that information. I'm just nursing mine alone for now.

Dec 08, 2008 | 1996 Cadillac DeVille

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