Question about 2000 Cadillac Seville

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Overheating cadillac hey ghoration how r u doin i was speakin to a friend of mine and he told me that that thing about the temperature going over n then back to the middle its normal he told me that as long as the niddle dosent go feather than that is ok but i kind of found out that the engine fans werent working propertly they r only working in the lowest speed unless i turn on the ac is when they start working at the highest speed he told me that theres may be a broken sensor so what he told me was that we could fix that or he can put my engine fans to work at the highest speed constantly so i think thats what im going to do so ill let u know how it went to c if it solved the problem

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YOU CANT BYPASS THE COOLANT FANS TO OPERATE FULL SPEED.IF YOU TRY YOU ARE GOING TO HAVE HEAD ACHES AND PCM TROUBLES.YOUR THREE COOLANT FAN SPEED IS CONTROL BY THE POWER MODULE IT ASSISTS THE COMPUTER SWITCHING FAN SPEEDS AND CLIMATE CONTROL FUNCTION.CHECK ALL 3 FANS RELAYS ONE OF THEM IS NOT WORKING.IT WILL CAUSE FAN SPEED PROBLEMS.DONT BYPASS OR OVERRIDE FANS.IF SO.YOU ARE GOING TO HAVE PCM AND CLIMATE CONTROL PROBLEMS.IF YOU HAVE ALREADY CHECK 3 FAN RELAYS.THEY ARE GOOD LET THE CADILLAC DEALERSHIP CHECK IT OUT.

Posted on Oct 04, 2009

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1 Answer

1999 Cadillac STS Overheating


i would have to say ck. the easast things first,when was the last cooling system flush making sure all cooling system parts are clean and new coolant added(old coolant looses its abilaty to work properly when old)then have the thermostat ck to make sure it opens and closes at the proper temp.

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I have a 2006 Cadillac DTS my temperature gauge goes up and down but the car never overheats. When the needle is in the red the car putters but when the needle fall it rides smooth again


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