thermostat

2004 PONTIAC GRAND PRIX
108,000 MILES • 6 CYL • FWD • AUTOMATIC
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MEADEPEAK
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The temperature on my car fluctuates every time I stop. I was wondering if it might be the thermostat, or is there some kind of sensor. Where is the thermostat located?
Oct 16, 2009 at 9:26 AM
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STRAILER
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Hello, you should start by draining the coolant. here is a guide for that:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

Here is a guide that will give you an idea of what you are in for when doing the job:

https://www.2carpros.com/articles/replace-thermostat

Here is what it will be lie on your car (below):

Tighten the water outlet housing bolts to 25 Nm (18 ft. lbs.)

Check out the diagrams (below).

Please let us know if you need anything else to get the problem fixed.

Cheers, Ken
Apr 18, 2019 at 2:35 PM (Merged)
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NMACH
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What is the location of the thermostat on a 2003 Grand Prix?
Apr 18, 2019 at 2:35 PM (Merged)
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MASTERTECHTIM
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if you have a 3.4 l engine it is located under the throttle body. just follow the upper radiator hose to engine, the part it connects to is the thermostat housing. hope this helps. remember feedback and votes for me are greatly appreciated
Apr 18, 2019 at 2:35 PM (Merged)
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LOCUTUSBRG
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I have a GTP supercharged. Where is the themostat located? it is in a different spot than in the normally aspirated v6
Apr 18, 2019 at 2:36 PM (Merged)
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ERNEST CLARK
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Your thermostat is located right next to the throttle body towards the front of the car. You need to remove the injector cover to get to it.

You have two radiator hoses. One goes to the water pump, the other goes to the thermostat housing. Follow the hoses and you'll find your thermostat.
Apr 18, 2019 at 2:36 PM (Merged)
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SLINN104
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Where is the thermostat located on the 2002 grand prix ?
Apr 18, 2019 at 2:36 PM (Merged)
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MMPRINCE4000
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On GM V6 engines they are on intake manifold, follow upper hose to thermostat housing.
Apr 18, 2019 at 2:36 PM (Merged)
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WAYNE_O
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I have a 1996 Pontiac Grand Prix 3.1 litre. I recently replaced the water pump and now it is running hot. Could the thermostat be fouled up? If so what is the step by step procedure to replace it? Where exactly is it located?
Apr 18, 2019 at 2:36 PM (Merged)
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HEADHUNTER
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i beleive if you follow the upper radiator hose from the rad to the engine the thermostat should be on the other end of that hose
Apr 18, 2019 at 2:36 PM (Merged)