Question about 1999 Cadillac DeVille

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Very Simple problem. I have no heat period, in my 1999 cadillac deville. Where should I start ??

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  • Tijen Eyo Dec 07, 2008

    My 1999 Cadillac Devile heater or air does not come on, so also is the defogger. The lights comes up but no air either hot or cold.

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Check / change the the cooling system thermostat. If the thermostat is not opening then the hot coolant can not flow to the heater core. $11.00 at Rockauto. http://www.rockauto.com/catalog/raframecatalog.php
http://info.rockauto.com/Gates/Detail3.html?www.gatespowerpro.com/resources/images/33808.jpg

Posted on Nov 30, 2008

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