1999 Cadillac DeVille Logo
Posted on Oct 16, 2009
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Need to know where the thermostat is on my 99 deville

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  • Posted on Oct 16, 2009
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Hi,
The thermostat is located in a housing attached to your engine, where the top radiator hose is connected to that housing.
I hope this helps...

Mark Carrington

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  • Posted on Oct 18, 2009
Mark Carrington
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The thermostat in the northstar engine is located at the bottom radiator hose (unlike most conventional cooling systems), the hose connects into the housing where you will also find the water pump.
Remove the hose from the housing,then remove the two bolts on the flange,the thermostat can then be pulled out.
Take note of the orientation of the thermostat as you remove it.

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My 99 caddy deville over heated 245/250. I let cool put antifreez drove home overheated. Later it wouldnt start. They say its my starter.aweek later it turns on... What could cause this?

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