Question about 2004 Pontiac Grand Am

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I noticed recently the temperature gauge goes up while idling or under a load (uphill), slow traffic.

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  • spozarich Mar 17, 2011

    If I leave it idling and it heats up, at what temperature should the fan come on?

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I would check to see if the cooling fans are working, check relay and coolant temp senosor if they are not.Also check coolant level and if you have never flushed the radiator it is time.GMs long life coolant has not really proved to be so, in fact it tends to gum up worse than the old green stuff.If the fans are working and a flush does not cure the problem then try a new thermostat,If that does do the trick you will need a new radiator.Good Luck!

Posted on Mar 17, 2011

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1st check your fluid in the radiator while the engine is cool. if the temp. guage is going up and down while in traffic,i would check for a bad thermostat. then i would check for a bad fan in front of radiator. or bad temperature sensor to the electric fan that cools the radiator. NO LEAKS? please look under the car while running,this may narrow your search. if it's a fluid leak, it may only be a hose. or it may be a leaking heater hose. the thermostat controls how much coolant that goes through the engine to keep a constant temperature in the engine to maximize preformance of the engine. if the heat guage goes up and down,it may only be a bad thermostat,or a bad fan relay,or a bad fan relay.hope this helps and thank you for choosing fixya.com!

Posted on Mar 17, 2011

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