Question about 2004 Pontiac Grand Prix
Possible headgasket concern. First step should be CO leak detection test in cooling system
Posted on Jan 10, 2013
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Posted on Jan 02, 2017
i have the same problem, i was just told to change the temp contol sensor which is only about $13.00 gonna change it friday!!
Posted on Jan 28, 2009
This sound you hear is your cooant going to your heater core. Check your coolant level , radiator cap and thermostat. one of these mught be on its way out. If you have no problems with your heat or a/c then flush your radiator and don,t worry about anything. I hope this helps. Don,t forget to rate my answer, thanks
Posted on Feb 27, 2009
Sounds like the temperature blend door actuator may be bad or the vacuum hose to it is disconnected.
Poor Heater System Performance CAUTION
Check all fluid levels and adjust as needed, before operating vehicle for extended periods at idle.
Posted on Nov 19, 2010
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