Asked by May 14, 2017 at 09:53 AM about the 2000 Cadillac DeVille Sedan FWD

Question type: Maintenance & Repair

Okay, have a 2000 deville base. It's overheating. No leaks, not losing any
coolant, no white smoke, no milky substance in the oil. What could this be?

11 Answers


try a new thermostat and a coolant flush , let us know what happens


Already did that.


I had a van that did this, my radiator was going bad.


Radiator checked out fine. Have no clue to what it could be. Purged the line. Changed coolant resevoir cap.


Steven, have a combustion leak test done. if there are combustion gasses in your cooling system then you might have a bad head gasket. many shops can do this, or you can buy a kit from the auto parts store for about 50 bucks and do it yourself. lots of youtube videos on the net.

1 people found this helpful.

I agree, check for combustion gases in the cooling system. If you have a Northstar it's probably going to be the head gaskets. All Northstar engines blow head gaskets sooner or later!! HTH. - Jim


Can you just trust the Cadillac service mechanic to diagnose it?

1 people found this helpful.

On something this old, the Cadillac Dealer may not want to work on it. You can give them a try. I'd recommend a Cadillac Dealer if yours will work on it. If not, try your local Chevrolet Dealer. They tend to be a lot less snooty. HTH. -Jim

2 people found this helpful.

Thanks Jim


You're welcome. Glad to help. -Jim

Coolant reservoir was the problem on my 2000 Cadillac DeVille it was not the cap it was the entire reservoir tank on my other 2000 DeVille it was The Purge line stopped up everybody said it was head gaskets don't believe everything you hear try the simple stuff first

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