Question about Cadillac DeVille

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Hi I have a 1998 Cadilac Deville Concours and for some reason out of no where all the lights on the dash began flashing and the heater kicked on then I recieved a number of messages 1) Your car mite not restart 2)AC Off 3) Security Failure and a number of others so I turned car off and everything went off but the heater blower that went off about 4 min later then i restart the car 1 hr later and there was no problems until the other day it did it again Im thinking that it could be the VAT SECURITY SYSTEM any thoughts or suggestions thank you

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  • Gary Parmeter Jul 07, 2010

    Hi I have a 1998 Cadilac Deville Concours and for some reason out of no where all the lights on the dash began flashing and the heater kicked on then I recieved a number of messages 1) Your car mite not restart 2)AC Off 3) Security Failure and a number of others so I turned car off and everything went off but the heater blower that went off about 4 min later then i restart the car 1 hr later and there was no problems until the other day it did it again Im thinking that it could be the VAT SECURITY SYSTEM any thoughts or suggestions thank you

  • Gary Parmeter Jul 09, 2010

    Ok I will give this a shot thank you for the advice

  • Gary Parmeter Jul 09, 2010

    Ok I will give this a shot thank you for the advice

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Hi! Its definitely not the VAT (vehicle anti theft) deterrent, but Im pretty sure of a faulty PCM (powertrain control module). If its the VAT it wont move at all from the very start, but since it still runs you can count that its not the VAT. I believe that the PCM is bout to reached its breakpoint so be ready for it will need replacement. Hope this helps and have a good one!

Posted on Jul 07, 2010

  • Gary Parmeter Jul 08, 2010

    Thanks now my question is what is the PCM and what should I expect the cost to be thanks again

  • dj_relly999
    dj_relly999 Jul 08, 2010

    PCM (powertrain control module). The PCM has connectivity on every electrical system on the car. The max can be atleast $200.

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  • Cadillac Master
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Have the alternator checked to make sure it is charging correctly.

Posted on Jul 06, 2010

  • Gary Parmeter Jul 06, 2010

    I have already replaced the altinator as well as the battery but the altinator was used

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