Question about 2000 Cadillac DeVille

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I have a cadi 2000 deville base model and my service theft system light shows up on my dash and my gas gauge goes from full to empty, and my speed ranges from 55 mph to 150 mph. i have had the ignition switch and the key lock cycl. replaced and this still is giving me problems.also i did disconect the battery and i tried to rest with my remote and no luck. please help. cliff s.thank

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  • clifford swain Mar 31, 2011

    yes i have an obd2 scan tool should i have somethig better

  • clifford swain Apr 01, 2011

    ok i will get back with you later today on this

  • clifford swain Apr 02, 2011

    hay thanks for the help i have found the problem , there was a broken chassie ground wire bye the alternator . took a lilttle time to remove the fan to get to the wire but it fix my problem. once again thank you. cliff.



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Hi Cliff,

Firstly do you have a scan tool?
You will need this tool to determine weather it is a wiring fault or the instrument cluster fault.

Let me know and I can send you the information.



Posted on Mar 31, 2011

  • Jason Maurirere
    Jason Maurirere Mar 31, 2011

    Ok, you need to find out if there are any fault codes which come up on the OBDII scan tool, then let me know.
    Caddilac stae that this is a Instrument Cluster problem and in most case's you need to replace the Instrument Panel. But lets make sure its not a wiring circuit problem first.



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