Question about 2005 Pontiac Grand Prix

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I have a 2005 Pontiac Grand Prix my cars fluids are all ok but its overheating. Put in a new thermostat and it is still running hot. The radiator cooling fans will not turn on where do i start?

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  • Pontiac Master
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CHECK COOLING FANS FUSE AND RELAYS.IF ALL IS GOOD PROBLEM COULD BE FAULTY COOLANT TEMPERATURE SENSOR OR FAULTY PCM OR FAULTY FAN WIRING.

Posted on Mar 31, 2011

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1 Answer

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sound like need bleed air out of the cooling system.most newer vechicles when make repair on coolant system parts cooling system need to be bled.

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For car running hot and overheating issues, I suggest to you go through this help links. Click this link below and go through the troubleshooting procedure to take care of the problems: ----Car runs hot? http://howtobyme.blogspot.com/2011/11/car-runs-hot-in-traffic.html
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Feb 03, 2012 | 2005 Pontiac Grand Prix

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2002 pontiac grand prix center council get hot when the car is idling


Start by checking your coolant level-both the radiator (when it's cooled enough to remove the cap) and the overflow tank. The radiator should be full with clean-looking coolant, and the overflow tank should be about half full (it has a cold mark and a hot mark on it). If the coolant is correct and not leaking or losing fluid, then check your cap for a good seal-the coolant is pressurized when car is running, and an old cap can leak pressure. Do your radiator fans cycle normally? They should come on when your coolant reaches a set temperature. Also, is your coolant more than two years old? If it is, I'd change it and consider having the radiator and engine flushed to remove any build-up of sediment or rust, scale, debris. Which would also be a good time for a new thermostat-cheap and necessary maintenance items. As for possible worn parts or needed repairs-well, your water pump might be something to keep in mind if the above mentioned checks don't stop the overheating. Hope you get it fixed soon before it gets worse-overheating is very bad on these aluminum head engines.

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1 Answer

1997 Pontiac Grand Prix overheating in stop and go traffic


its either of the 3 ur water pump is weak and couldnt supply the right amount of coolant to ur engine / ur radiator is clogged or your thermostatic valve is stuck up that restrict full flow of fluid to the radiator thats why when u use the heater that uses ur coolant hot water as a heating unit the temp. goes down...

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No heat in 2005 grand prix - not the thermostat


Most likey cause is the valve that cuts off the hot water from flowing through the heater radiator core in summer. Sometimes this valve is cable operated, but mostly by vacumn servos. Find the offending servo & make sure the vacumn tube is connected and undamaged. If this is ok check its operation and replace if it's not moving the valve.

Mar 17, 2010 | 2005 Pontiac Grand Prix

1 Answer

Car runs hot. Its 2005 grand prix


Start by flushing your coolant system, then refill with a quality coolant.
Run up to temperature and check again for level (when cool again)

Check that the radiator is getting really hot quite suddenly when running from cold, as this is the best way of checking thermostat operation.
When over a set temperature (check your manual) the fan should come on.
If it never does - troubleshoot the fan (temperature switch or sensor first, then fan on direct feed to see if it powers up ok)

Feb 07, 2010 | 2005 Pontiac Grand Prix

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