2003 Cadillac CTS Logo
Mayra gallegos Posted on Jul 29, 2012
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What's your problem?I have a 2003 Cadillac cts my check theft system has came up my car will start and runs the emergency lights won't stop blinking.my key won't come out so I got it out w

My car will run and when I turn it on my key gets stuck and won't let me take it out! The emergency lights won't stop going no horn just light and I get a check theft system alert I have unplugged battery and still nothing

1 Answer

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  • Expert 186 Answers
  • Posted on Jul 29, 2012
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Joined: Jul 29, 2012
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Sounds like anti theft device has kicked in needs to be reset dont know how to do that though

5 Related Answers

Anonymous

  • 3 Answers
  • Posted on Feb 10, 2009

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.

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Anonymous

  • 1 Answer
  • Posted on Apr 28, 2010

SOURCE: theft system locked

To get the key out; look under the steering wheel for a plastic flat head screw. untwist it and then push the spring in and your key will be free. Then, go to your fuse box and remove the main fuses and you will hear the doors unlock when the system reset itself. Plug them back in and start your car. This just happened to me... seems the only things that were working were the navigation screen, headlights, fog lights, and reading light on the inside. Dash board was all dark except the engine light.

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James Bradburn

  • 299 Answers
  • Posted on Jan 18, 2009

SOURCE: 2003 Cadillac cts battery up/won't start

Its the battery. The colder it gets the less cranking amps it has. Keep the car in garage or get a battery wrap warmer. Also try to get a battery with the most cranking amps for the size battery it will take.

Anonymous

  • 1 Answer
  • Posted on Apr 06, 2011

SOURCE: Security Theft System comes up on Cadillac CTS 04 - Cannot start

What is the solution ?

Anonymous

  • 31 Answers
  • Posted on Dec 22, 2011

SOURCE: my 2004 cadillac cts says service anti theft

you have a low voltage problem. either a bad battery or a brake in a wire somewhere. My sister had the same problem in her car. Had it to the gm dealer 3 times they couldnt figure it out. I put a new battery in, new wire from batter to starter, and a new altenater and wires to it. just by dumb luck i noticed the (+) wire from the bat to the fuse box under the hood was broke at the fuse box. Put new wire on it and 2.5 years later no problems.

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My 2003 Cadillac CTS starts then immediately dies. Causes please.

Question edited for clarity.
Question moved to model category.

By disconnecting the battery, you also disconnected all the set up of the security and engine immobilizer coding.

https://www.google.com/search?q=2003+cadillac+cts+security+system+reset

How do i perform the 2003 Cadillac CTS anti theft reset?

Vehicle History https://www.vehiclehistory.com > questions > how-do-...
To reset the anti-theft system in your 2003 cadillac cts depress the key fob's panic button for five seconds before pressing the lock button twice standing ...
2 answers · Top answer: To reset the alarm on the 2003 Cadillac CTS You have two options. You can pop the hood and disconnect the positive battery cable, then leave it off for ... People also ask
How do I get my Cadillac out of anti-theft mode?"

Look for a button that allows you to slide the physical key out of the fob. Step 2: Turn the vehicle key to unlock the car door without releasing it. Hold the key for 30 seconds in this position. This will signal to your car's system that you have the right key, and will enable you to bypass your car's alarm system.
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Cadillac CTS 2006

Yea, take it to the dealer , nothing you can do or fix !
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I have a 2007 cadillac cts with a no crank no start problem. The TC light is on as well as the theft protection light and the check engine light is also on,but the car will not say anything.

If your theft light is on and stays on after the key is in the on position after self check, then you will most definitely have a no start condition. You can try leaving the key on for about 15 minutes to see if the theft system will reset. If so, you will probably need to have the lock cylinder and halo replaced.
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2003 Cadillac CTS won't start after disconnecting battery

Don't do that again! You will need to re-boot the on board computer system by entering a code. Call your nearest Cadillac dealer.

If you need further help, reach me via phone at https://www.6ya.com/expert/lloyd_4256582adacd68ee

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An amateur mechanic tripped something from underneath the dash, behind the glove compartment of my 2006 Cadillac CTS (while looking for an a/c related leak). The horn starting blaring, the key stuck in...

Hello and welcome to FixYa!
I believe that he tripped the BCM (body control module). If the BCM is faulty, you can expect electrical failures on your vehicle for the electrical circuitry runs through the BCM. You may need to have it replaced to resolve the electrical issues.
Hope this helps and thank you for using FixYa! Have a good one!
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You need to take it to the dealer. One of the system computers is failing. I do not know that model but it could be either the body computer or dash computer. Good Luck.
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