Question about 2001 Cadillac DeVille

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2001 Cadillac Deville. My security system light came on. Then when I parked it and shut the car off it wouldn't start back up. dash cluster is acting crazy.when car is off things stay on...?

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  • Cadillac Master
  • 1,373 Answers

Try a diagnostic test it will give you fault code and tell you exactly whats wrong.

Posted on Apr 04, 2016

6 Suggested Answers

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Posted on Jan 02, 2017

jwyatt816
  • 3 Answers

SOURCE: 2001 Cadillac Deville Security System

Check engine to chassis ground I had same prob

Posted on Oct 03, 2008

MrScary66613
  • 1990 Answers

SOURCE: 2001 cadillac deville security light won't turn off

It should have Turned off with the Insert of the Newly Programmed Key. If Not, It may need a Computer Reset. You Can try Pulling the ECM Fuse for 5 Min. to Reset the Computer. If this does not work, Try disconnecting the Battery and Reconnecting. Make sure that you have a RadioCode before Disconnecting the Battery Though. Please Rate My Response! Thanks!

Posted on Jan 30, 2009

  • 3 Answers

SOURCE: Turn off security light on my 1992 cadillac deville

I had that same problem and it took me forever to figure out what was wrong. You are probably using an aftermarket key as was I. The stupid little plastic/metal chip in the shaft of the key is for the security system. Sometimes if you insert the key and turn too fast it sets off the security system. To solve the problem go get another key made from a different key maker, they cost around $15-20. Or, insert the key slowly and turn the ignition slowly. Or go get a good key from the dealer, I've heard it may be ~$50 for this key but it should work the best. FYI I still just use my aftermarket key and just deal with the occasional no start wait 3 min ordeal. Good luck.

Posted on Feb 10, 2009

  • 97 Answers

SOURCE: 2001 cadillac deville, overheats without loss of coolant

First, provided their are no visible coolant leaks and/or loss of coolant with no signs of leaks, I would thoroughly flush cooling system and replace coolant, then check and/or replace thermostat (you can place thermostat in boiling water to check for proper function), if you have tried these 2 steps and still are experiencing overheating you may need to replace your water pump which can be a tricky job if you're unfamiliar and try to do it yourself, however, I could walk you through it if necessary. Also visually check your radiator hoses for bulges, wear ,etc along with heater hoses etc. You may want to also check radiator fins to see if they are dirty/obstructed and clean if necessary. Let me know if I can assist you further and how it works out

Posted on Aug 30, 2009

  • 1 Answer

SOURCE: 2001 Cadillac Deville problems starting

I have had the same problem and I have come to the conclusion it is the security system. After 3 minutes the car will start so there is nothing wrong with the battery or starter. I have had it to the dealer a few times and they cannot solve it. It may be the locks on the doors and they may not be resetting properly. I have learned to live with it.

Posted on Oct 14, 2009

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Dec 29, 2015 | Cadillac Cars & Trucks

1 Answer

Theft security problem


Usually it means the computer is not accepting the chip in your key.
It can be the key, the sensor in the lock cylinder, or something in the security module or computer.
You might try another key or lock and unlock the driver's door with the key.

Jul 27, 2013 | 1998 Cadillac DeVille

1 Answer

1988 Cadillac DeVille


The 88 Deville is one of many cars made by GM that is using the antitheft system called VATS PASSKEY. (its that little black chip in the key) When this system fails, the car can't get the signal from the chip, so it locks out the starter to prevent theft. The car thinks it's being hot wired, so it shuts down. Look for a light on the dash that says SECURITY or ANTITHEFT. This is proof of a security failure. This might be your problem. This link explains more.
http://vatspasslockpasskeysecurityhelp.yolasite.com/

Dec 31, 2011 | Cars & Trucks

1 Answer

How do you shut off brake light on dash on a 1989 Cadillac sedan deville?


the park brake must be fully released if not the light will come on w/key on eng off reach down and pull back on the park brake pedal if light don't go out then it may be the brake fluid level switch located on the bottom of the brake fluid reservior. the switches were a high failure rate

Aug 23, 2010 | 1989 Cadillac Sedan DeVille

2 Answers

Anti theft system came on dash. shut the car down will not start. 2002 cadillac. i was told 30 differ sensor showed wrong. which sensor to start with.


The SECURITY light is located on the instrument panel cluster.

If the ignition is off and any door is open, the SECURITY light will flash, reminding you to arm the system. To arm the system, do the following:
1. Open the door.
2. Lock the door using the power door lock switch with the door open or the remote keyless entry transmitter. The SECURITY light should come on and stay on.
3. Close all the doors. The SECURITY light should go off within approximately 30 seconds. If a door or a trunk is opened without a key or a remote keyless entry transmitter, the horn will sound and the lamps will flash for about 30 seconds.

Also can check this and other details in the 2002 Cadillac Owners Manual (page 85 and next).

Hope helps (remember rated and comment this).

Jun 15, 2010 | 2000 Cadillac DeVille

1 Answer

2001 cadillac Deville won't start-------


Your security system inside your steering wheel is probably gone bad and needs to be replaced.This is a dealer job or a very experienced auto elactric shop.

Aug 01, 2009 | 2001 Cadillac DeVille

1 Answer

Dash went crazy


I TOOK THE CAR TO THR DEALER IT WAS MY COMPUTER SECURITY SYSTEM BUT IS MAKE THE CAR DO A LOT OF CRAZY THINGS$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$

Jun 17, 2009 | 2001 Cadillac DeVille

1 Answer

1997 cadillac deville delagance - anti theft device


I've got a 97 deville d'elegance that has issues similar to these. Last year the red anti-theft light came on and the car wouldn't start-took it to the dealership and they replaced the PCM? (the main brain for the system) for $900...the guy told us the wiring was so corroded he didn't want to mess with it much. Today the message started flashing on the dash that says "anti-theft problem/ car may not restart" but it still turned over in the driveway a couple times so I am hoping I can reset it. The wiring system is jacked and will probably need to replace the wiring harness completely. Doubt its worth it. Not a secure feeling with 2 babies in the back seat in the middle of winter....

Mar 30, 2009 | 2001 Cadillac DeVille

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