03 Deville trunk lock and glove box lock issues
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 03 Deville trunk lock and glove box lock issues in Past Cadillac Vehicle Discussion; My 03 trunk and glove box lock cylinders are giving me a bit of a headache. I cannot lock the ...
  1. #1
    03GrayDTS is offline Cadillac Owners Member
    Automobile(s): 2003 Deville DTS
    Join Date
    Aug 2012
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    03 Deville trunk lock and glove box lock issues

    My 03 trunk and glove box lock cylinders are giving me a bit of a headache. I cannot lock the glove box or open the trunk with the key. I bought the car with 1 key/remote. The key goes in half way in the trunk and same with glove box. If I remember, the key doesn't go in that far in glove box (from previous STS). The door cylinder and ignition are keyed alike, so I don't think think those cylinders have been replace. Any ideas?


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  3. #2
    Mojo88's Avatar
    Mojo88 is offline Cadillac Owners Fanatic
    Automobile(s): 2003 White Diamond DeVille 'Base'
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    Re: 03 Deville trunk lock and glove box lock issues

    '03 DeVille here also. Recently, my key would not go in my trunk. It would only go about halfway in. I fiddled and jiggled, then got out the penetrating oil and kept soaking the tumbler, then trying the key again. Then it would go in just a tad more. Finally, I removed the whole tumbler unit from the trunk and put it on the bench for easier access. This time I REALLY soaked it in oil, LOL. But still no luck.

    Then I tried a spare key and it slipped right in with no problems! I was amazed. So I started looking very carefully at the problem key and I found that the groove in the center (one groove on each side) was peened over at the nose of the key. I used a small file and cleaned up the groove, so that it looked like the spare key. As soon as I did that, the original key worked like a charm!

    Did I explain this properly? I would bet a hundred bucks this is your problem too. This baffled me for a couple of weeks until I figured it out. I can post a pic if that would help. The 'damage' to my key (and likely yours too) was nothing you'd normally notice. I only found it when I used a magnifying glass to look at the key that worked and compared it to the key that would not work. It only took a few light passes with a small file to correct the problem.

    Anyway, that might be something worth looking at.....

    Good luck

  4. #3
    03GrayDTS is offline Cadillac Owners Member
    Automobile(s): 2003 Deville DTS
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    Thread Starter
    I'll give it a look see. Thanks a bunch....

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  6. #4
    bigm57ict's Avatar
    bigm57ict is offline Cadillac Owners Connoisseur
    Automobile(s): 1979 Coupe deVille, 1995 Sedan DeVille (sold)
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    Re: 03 Deville trunk lock and glove box lock issues

    Is it possible you have a valet key?
    Some cars come with a valet key that will open the doors, but not the trunk or glove box.

  7. #5
    03GrayDTS is offline Cadillac Owners Member
    Automobile(s): 2003 Deville DTS
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    Thread Starter
    I don't believe so...... What's the difference between the keys (looks)? Mine has the colored emblem on the key.

  8. #6
    03GrayDTS is offline Cadillac Owners Member
    Automobile(s): 2003 Deville DTS
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    Thread Starter
    Thanks Mojo. The groove on the key was the issue. Filed it down a little and it went right into both locks.

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