2004 Grand Prix overheating. Help!

Asked by GrandPrixLover97 Jul 31, 2016 at 11:58 PM about the 2004 Pontiac Grand Prix GT1

Question type: Maintenance & Repair

Hello everyone, so I have a 2004 grand prix gt with
196k miles on it and for some reason it has been
overheating like crazy in the past week. The needle
just keeps going up, and then about 2 miles down
the road the computer says "AC off for engine
protection" I replaced the thermostat today and it
didn't help. I have a hunch that it's my upper
radiator hose, because I can drive it around the
block and the only warm thing will be that. It'll be
hot and slightly soft to the touch. If anyone has any
insight on what to do, would you be willing to
provide me with some help?

7 Answers

101,815

Check your water pump is working, remove radiator cap and see if any coolant is being drawn down. Or run the heater core on max and see if you are getting heat in the car. Running the engine and letting it continually overheat can really ruin it. So I'd get the cooling system completely checked out. Flush it & make sure you have no blockages, replace thermostat & radiator cap, check the water pump, hoses, coolant temp sensor, also check for presence of hydrocarbons with a test kit, that will let you know if you have a possible bad head gasket.

90

Water pump for sure those cars are the one thing that's goes bad alot

7 people found this helpful.
18,295

A rad hose has no effect on coolant temperature. Is your rad full, first of all? If so I'd get it flushed and pressure tested. I don't think its possible for a water pump to stop pumping, it may make noise, or leak, but it always pumps.

1 people found this helpful.
101,815

If the upper hose the only one getting warm, then there is clearly a blockage or coolant is not circulating. Hopefully it's something simple like thermostat not opening. And yes, a water pump can stop pumping. I've removed them and seen the fins on the impeller nearly gone, from corrosion and wear.

3 people found this helpful.

i would say check the radiator then the water pump because i've also had the same issue for the past year and month and its not getting any better i hope this is helpful and i wish you all the best luck

cause ive replaced the thermostat but the problem is getting worse but check the hoses and the resivore where the coolent sits but i have also known if you put ice to cold water in the coolent resivore it would cool the engine down to normal opratating temp

Your Answer:

Grand Prix

Looking for a Used Grand Prix in your area?

CarGurus has 191 nationwide Grand Prix listings starting at $1,500.

ZIP:

Own this car?

Share your experience with others.

2004 Pontiac Grand Prix

Review another car

CarGurus Experts

  • #1
    munron
    Reputation
    8,160
  • #2
    James Sparrow
    Reputation
    7,500
  • #3
    Dorian Hendricks
    Reputation
    6,040
View All

Know more, shop wisely

Search

Related Models For Sale

Used Pontiac Bonneville
47 listings starting at $2,495
Used Pontiac GTO
8 Great Deals out of 181 listings starting at $9,500
Used Pontiac G6
6 Great Deals out of 308 listings starting at $2,300
Used Pontiac Grand Am
57 listings starting at $2,900
Used Chevrolet Impala
274 Great Deals out of 4,369 listings starting at $995
Used Chevrolet Monte Carlo
6 Great Deals out of 200 listings starting at $2,950
Used Ford Mustang
944 Great Deals out of 21,461 listings starting at $1,651
Used Chevrolet Corvette
765 Great Deals out of 12,482 listings starting at $2,800
Used Toyota Camry
2,001 Great Deals out of 30,900 listings starting at $1,500
Used Chevrolet Malibu
1,031 Great Deals out of 18,753 listings starting at $1,100
Used Honda Accord
1,546 Great Deals out of 29,529 listings starting at $1,900

Used Cars For Sale

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.