Question about 2004 Cadillac Deville

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My key will not enter the ignition in my 2004 cadillac deville. It was working OK this morning. Now it won't.

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One of the tumblers in the lock cylinder has fallen and is jamming key. Cylinder will need replacing. Try gently tapping on cylinder ring and key while trying to insert key . If you do get it to turn, don't shut it off till you can get it somewhere to replace cylinder.

Posted on Jun 24, 2009

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Key switch asembly may have calapes internaly,may have to replace with a new unit & keys

Posted on Jun 24, 2009


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Might be the neutral safety switch. Is the security ligt blinking?
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How to remove fuel filter 2004 cadillac deville

It may require a 16mm and a 20mm wrench and you squeeze the plastic clip on the other side. Make sure key is out off and out of the ignition and remember that the line is still under pressure so wear eye protection. When finished prime the vehicle by turning the ignition on a few times to avoid a check engine light.

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Stuck eldorado key in DTS ignition now car won't start

Make sure your steering wheel isn't locked. Sometimes a key won't turn until you jiggle the wheel while trying to turn the key.

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04 cadillac deville key will not go in the ignition

Wiggle the steering wheel back and forth and try to make sure the key cylinder is in the off position. Sometimes the key will come out with the key not all the way off. If that is the sitation, and the key will work then the key needs to be replaced. If that doesnt work , the lock cylinder needs replaced ,because the tumblers inside are worn out or broken

Feb 25, 2011 | 2004 Cadillac Deville

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2004 Cadillac Deville Unable to insert key into ignition switch

check if there are anything stuck inside the key hole. or try to spray the lubricated oil inside the key hole. maybe then it loose the lock inside.

Nov 19, 2010 | 2004 Cadillac Deville

1 Answer


Stand bext to the car, engine off key out of ignition switch hold the lock and unlock buttons down at the same time for ten seconds if the locks do not lock then unlock it is NOT a re-sync problem. Make sur the battery is good and installed correctly If none of this works then you need to take car in for diagnosis of the keyless entry system. perfer a Cadillac dealer

Aug 22, 2010 | 2004 Cadillac Deville

1 Answer

Unable to insert key into ignition switch

Try this pull the steering wheel as far to the left as possible and while it is in this position try to insert key. Sometimes the steering wheel lock will get in a bind and prevent the key from being inserted. Hope this helps!!!

Nov 10, 2008 | 2004 Cadillac Deville

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