Question about 2003 Pontiac Grand Prix

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Overheats in traffic only to 21 degrees

2003 grand prix 3.1 i have replaced the thermostat and the temp. gage goes up to 210 after being in traffic for like 10 min it goes up to 210 but once i get going again it goes down. i have been told that it might be a head gasket. could it possible be the raditior ?

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If it only does it when it is parked and ideling it will be your cooling fan not working.
Start it up and let it run till it heats up,watch to see if the cooling fan turns on,it might have to run for awhile.Or take it for a drive to get it heated up and then when you park let it run and watch the fan to see if it turns on but also watch your temp gage don't let it over heat.The fan should kick in when the temp gauge is around the half way mark.I hope this helps you out.

Posted on Jan 10, 2009

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Go the Cheaper Route First and Go back to the Parts store and ask for a Cooler Thermostat. Try that and let me know what you have got.

Posted on Jan 10, 2009

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