Question about 1999 Cadillac DeVille
First check your water pump belt, it is on the left rear of the engine, remember the engine sits sideways. It is to the left of the throttle boy. It has one small belt with a black metal cover over it. With the engine running, make sure the belt is spinning, driving the water pump you can't see. If it is, you may have blown head gaskets.
Posted on Oct 02, 2009
OK LETS START FOR THE CHEAP HAVE YOU TRIED TO CHANGE THE THERMOSTAT OR THE TEMPETURE SENSOR THATS THE ONE CONTROL THE RADIATOR FANS
Posted on Jul 29, 2009
Your cylinder head bolts are the most likely cause they pull out of the block, it is a GM design flaw.
Posted on Jul 17, 2009
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