Question about 1999 Cadillac DeVille

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1999 deville overheating - 1999 Cadillac DeVille

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  • bng113 Mar 21, 2009

    I just put a new radiator, cat convert, o2 sensors in my 2000 deville. It overheated today AND my oil, which i just changed 2 weeks ago, the car says it needs to be changed. Checked the antifreeze it was low by about a half gallon but there are no leaks. Anybody have an idea how much HG repairs cost on these cars

  • Dennis Mulford
    Dennis Mulford May 11, 2010

    i need more info like are you losing anti freeze?blowing smoke

    or anything else it might be doing

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I just sent my car in to Cadillac about 2 months ago. I recieved a quote from them of over $4000 (and that wa after some begging and pleading). We ended up getting the repair done at a different GM garage to the tune of 3450 and that included a waterpump and thermostat. This was for the complete overhaul (there were about 2 1/2 pages of repairs and parts that we received as receipt). Hope this helps!

Posted on Apr 07, 2009

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Head Gasket problems are common on the 4.6. It is an expensive repair, because the engine has to come out and all the head bolt holes have to be retapped. Check it for leaks first. Check the water pump and water pump housing to cylinder head gaskets.

Posted on Feb 27, 2009

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If my 1999 cadillac deville goes up to 232 degrees is it overheating?


Outside of radiator is most likely full of dirt,leaves,
bird feathers,etc.
Remove as many things as necessary, & use an air hose
followed by garden hose to clean radiator.

Could try a new thermostat & make sure spark plugs
& basic preventative maintenance is done

Change Power Steering,Trans & Motor Oils
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Hello terez_price5 and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1999 Cadillac DeVille, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose an overheating Cadillac engine

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

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Hello rok4zeroe and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1999 Cadillac DeVille, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose an overheating Cadillac engine

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

Aug 27, 2010 | 1999 Cadillac DeVille

1 Answer

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Hello orhan_etiz and thank you for asking your question, on Fixya.

Here is a simple process that will walk you through a few steps that will pinpoint the overheating problem on your 1999 Cadillac DeVille, without even using any tools. It has helped millions of people, and I am certain that it will help you, because I wrote it for people like you. So here is the link to:
How to diagnose an overheating Cadillac engine

Anyways if that helps you any little bit, then feel free to follow me on Twitter. That one is at: twitter.com/acoates23234

Thanks for the vote, and good luck!

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2 Answers

I HAVE A 1999 DEVILLE


99 cadillac deville overheating put in new radiator,thermostat,waterpump. it stays cool at idle for a hour running.drivin about 15-30 minutes it overheats. is not using hardly any coolant to speak of.

Jan 05, 2009 | 1999 Cadillac DeVille

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