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2008 Grand Prix. At low speeds but under load (ie, up hill)
2008 Grand Prix. At low speeds but under load (ie, up hill) Temp goes up to 210 or a little more before fans come on. Both fans come on at that time, and the engine cools right down. Is this okay, or … read more
Cary York
Cary York
High School Diploma
214 satisfied customers
I have a 06 Pontiac Grand prix 3.8l. When we bought the car
I have a 06 Pontiac Grand prix 3.8l. When we bought the car it never would get to operating temp and the heater never blew hot air.So I figured it was a stuck open thermostat, I've replaced the thermo… read more
Dan
Dan
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Vocational, Technical or Trade Scho
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Pontiac Grand Prix: 2007 pontiac grand prix. Temperature gauge
2007 pontiac grand prix. Temperature gauge showed the car running hotter than normal, above the half way point, and now it isn't moving at all. I bought a new thermostat will that fix it or do I need … read more
Mike S.
Mike S.
Vocational, Technical or Trade Scho
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Pontiac Grand Prix: 2000 Pontiac Grand Prix GTP 3.8L. Trouble
2000 Pontiac Grand Prix GTP 3.8L. Trouble Code PO128 (coolant not at expected temperature). Mechanic changed thermostat and coolant sensor, code cleared. Temp gauge used to run at 1/4 (185 degrees), n… read more
Danny
Danny
Lead mech
Some college
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2002 grand prix: antifreeze..slow leak..intake gaskets..my coolant
My 2002 grand prix 3800 had been leaking antifreeze for a couple of years. Had it checked and was told no big deal, slow leak, none in oil and I should change the intake gaskets when I got the chance.… read more
Gary
Gary
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Vocational, Technical or Trade Scho
1,463 satisfied customers
2003 grand prix: temp gauge..faint smell of antifreeze..heater core
my 2003 grand prix temp gauge rises and falls. no heat coming out of fan and faint smell of antifreeze,inside the car.Is it a thermastat,heater core,ect… read more
hauto
hauto
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2004 PONTIAC GRAND PRIX GT: OVERHEAT..THE TEMP GAUGE MOVED..COOL DOWN
I HAVE A 2004 PONTIAC GRAND PRIX GT AND THE OTHER DAY IT STARTED TO OVERHEAT WITH STEAM COMING OUT ETC. AND THE TEMP GAUGE MOVED TO THE MAX. I PULLED OVER LET IT COOL DOWN AND WAS ABLE TO MAKE IT HOME… read more
ZZDaryl
ZZDaryl
Lead Auto Tech
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2001 Grand Prix GTP: intake manifold gaskets done..leak..gauge..fans
2001 Grand Prix GTP - Car had intake manifold gaskets done due to an external coolant(dex-cool) leak. Got the car back and engine immediately started running @190*F at idle and gauge rapidly moves to … read more
Dave Nova
Dave Nova
Pontiac Technician
Associate Degree
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2003 Grand Prix: the heater is blowing out cold air..kick..going down
My 2003 Grand Prix temp guage keeps raising up to 260 degrees very quickly and the heater is blowing out cold air. I am trying to figure out why it is doing this i have changed the thermostat thinking… read more
john aka eaut
john aka eaut
The Car Guy
High School or GED
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2005 Grand Prix GT: traffic..temperature gauge..overheated..weather
My wife just got a 2005 Grand Prix GT 36,000 mi. She was sitting in heavy stop and go traffic and noticed the temperature gauge fluctuate between normal and elevated( it never overheated ) in NY Jan w… read more
goodwrench9124
goodwrench9124
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Vocational, Technical or Trade Scho
3,392 satisfied customers
1998 Grand Prix GT: driving my..gauge shows..traffic my gauge goes
While driving my 1998 Grand Prix GT mu temperture gauge shows 160 degrees however when I stop in traffic my gauge goes up to 210 degrees. I assume my thermostat needs to be replaced. Is there somethin… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
2,403 satisfied customers
2002 Grand Prix GT: Well maintained..oil changes..000 miles..traffic
I have a 2002 Grand Prix GT with 116,000 miles. Well maintained and babied; regular oil changes, weekly car washes, monthly detailing. I purchased last March with 109,000 miles (travel 75% of the time… read more
Victor
Victor
Vocational, Technical or Trade Scho
204 satisfied customers
grand prix: hotter after replacing water pump...bled all the air
3.1 grand prix running hotter after replacing water pump...bled all the air out i believe...other ideas?… read more
JKuhns
JKuhns
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High School or GED
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2002 Grand Am: engine temperature..guage..dash..normal temperature
I have a 2002 Grand Am with the 3.4 engine temperature buy the guage on the dash shows 205 to 210 all the time. Just purchased this car is that the normal temperature?… read more
Pete
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General auto certifications
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Bonneville: overheating..acts..awhile and then overheat gauage
overheating problems with my 04 bonneville i replace the thermostat two times and coolant temp sensor and my temp gauage acts up from time to time works fine for awhile and then overheat gauage get st… read more
Pete
Pete
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2003 Grand Prix: passenger compartment..time I get cold air..hot air
I have a 2003 Grand Prix 3.1L, I am having problems with getting heat in the passenger compartment, the temperature gauge is sporadic it will move up to about 210 and then starts dropping back down at… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
2,403 satisfied customers
My 2004 pontiac grand prix gt cooling fan does not come on
My 2004 pontiac grand prix gt cooling fan does not come on until the temp rises above 3/4 hot. It does work when the AC is on. Do I need to change the temp sensor and relays? If so, where are they loc… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
2,403 satisfied customers
2005 Pontiac Grand Prix: overheating..blowing..the gauge..smooth
My 2005 Pontiac Grand Prix is having issues with the Engine Coolant gauge, as it will not indicate whether the engine is overheating. The fans are constantly blowing and my heating and defrosting is w… read more
GM Tech (Cam)
GM Tech (Cam)
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Vocational, Technical or Trade Scho
2,403 satisfied customers
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Meet the Experts:

GM Tech (Cam)

GM Tech (Cam)

Pontiac Technician

2,403 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Dave Nova

Dave Nova

Pontiac Technician

2,014 satisfied customers

ASE Master Certification. GM World Class Certification

Gary

Gary

Pontiac Technician

1,463 satisfied customers

15 years GM master tech/15 years ASE master

Ron Z.

Ron Z.

- Pontiac Tech -

778 satisfied customers

18+yrs experience. State Inspector and Pontiac Diagnostics

Don - Mo Lurch

Don - Mo Lurch

Pontiac Mechanic

558 satisfied customers

GM, Chevrolet Cert., Heavy Line Mech, Race Shop Owner, Mobile Electronics.

John

John

GM FACTORY CERTIFIED TECHNICIAN

514 satisfied customers

ASE A1-A8 w/L1 GM master technician.Factory certified/40 years experience

car tech

car tech

ASE Certified Technician

446 satisfied customers

25 years master tech and shop owner

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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