Question about 2003 Cadillac CTS

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Anti-theft system? My 2003 cts out of no where started displaying something about the anti-theft system, and shortly afterward, The whole car shut down, we couldn't even take the key out. the dealer tried to do a diagnostic test, but they gave me the answer "we don't know whats wrong with it!" I got frustrated with them so I pulled it out of their shop, and now I'm not too sure on where to take it, does any one know what I need to fix it?

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  • jennblas Sep 09, 2008

    We have the same anti theft problem. The key is in the ignition, and will not come out. If anyone has a solution, please let us know.

  • kenbo161 Oct 10, 2008

    my 2003 is doing the same . can't get the key out of the ignition , veh won't start , radio is not comming on and is showing service theft system across front of it

  • CTS_Sally Nov 05, 2008

    The same problem happened to me in February. We replaced the battery and everything was fine. This time we can not remove the key nor will the gears shift. We removed the battery cable a couple of times and removed/replaced the battery and the key still will not come out and the gears will not shift. The dealership wants $150 just to put it on the machine. Oh and when we called them about the problem this time they told us to remove/replace the battery cable and all should be ok. (NOT).

  • Anonymous Dec 02, 2008

    Wut Fuse Number was it on the box i have the same problem

  • josebarajas Dec 15, 2008

    I have an 03 CTS with the same problems. It wont shift, the key wont come out and it is marking "TC" and the anti theft yellow icons on the dash. To top it off my gas gauge is not working.

  • anzza Feb 19, 2009

    hi, i have the same problem with my cadillac cts 06, it starts, but the key couldn't come out, it doesn't shift out of park, traction control lights on, and service theft system is displayed......the hic , is that, there is no GM dealer in my country (libya) plz did any one had yhe same problem and got it fixed ? adoumi@hotmail.com

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MY CAR STARTS BUT WANT GO INTO GEAR AND THE KEY WANT COME OUT

Posted on May 08, 2009

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I am dealing with the same problem with my 03 CTS. Everytime I have this issue I have to play around with the theft fuse found under the hood, and my car finally starts. I dont push the fuse all the way back in until I start the car. I just lay it on top until I here a clicking sound and fiddle with it and finally it starts and once it does I just push it back in, close the hood and be on my way. Eventually I have to get it fixed but this is working for now

Posted on Nov 04, 2008

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Mmm well my cadillac dont turn on for nothink just the alarm and lights all i did was checking the fuses and then it shut off

Posted on Aug 09, 2012

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I have the same problem and I boost the car with the battery under the back seat and it will be fine for 2-3 month. It usually happens when it rains or is damp out

Posted on Feb 03, 2011

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I recently had the same problem, it was the crank sensor.

Posted on Sep 13, 2008

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I am thinking about buying a 2003 cts. Should I do this?

Posted on Dec 18, 2008

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