Question about 2000 Pontiac Grand Prix

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Low coolant level in 2000 Grand Prix GT

Low coolant level light keeps coming on. I fill the coolant and it keeps going down about an inch below where it was . The rad doesn't leak, and heat guage is fine. Where is the fluid going?

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  • hoohah_6 Jun 08, 2009

    The intake manifold had a small leak in it. Took it to the garage and had it replaced for $472.00

  • hoohah_6 Jun 08, 2009

    The intake manifold had a small leak in it. Took it to the garage and had it replaced for $472.00

  • fplqnewc
    fplqnewc May 11, 2010

    Have you checked your oil to see if there is evidence of coolant on the dipstick?


    Also, have checked the radiator cap?  Overflow bottle cap?

  • Anonymous Mar 16, 2014

    Low coolant light comes on when I am idling in my 2000 impalla

  • Anonymous Mar 20, 2014

    Low coolant and rising temp

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I had the same problem this winter. The head gaskets were blown, took the block apart and replaced all the gaskets. Cost about 300 - 400 in parts and took one full day to finish with 3 men who aren't particularly experts but who aren't rookies to say the least.

Goodluck

Posted on May 24, 2009

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If you aren't seeing and/or smelling any coolant then you could have a small leak in your head gasket.  If this is the case that would mean the coolant is mixing with your oil.  I don't know how long this has been going on for you but I would suggest pulling your oil dipstick and seeing if you can see any water dropplets on the stick.  If you are losing coolant and can't see it I would be very careful because a blown head gasket can lead to some very expensive engine repair.  If you can't find the leak I would take the car to a mechanic and have them check it out for you.  Good luck.  thanks for an honest rating and for using FixYa!

Posted on May 24, 2009

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  • Pontiac Master
  • 6,982 Answers

Sometimes full is not full...If you don't add any, does it stay an inch low or does it continue to go down?
also check under the car after being parked overnight. any coolant on the ground will give you a clue as to any small leaks.

Posted on May 24, 2009

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Posted on Jan 02, 2017

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Temp gauge in 98 pontiac wont work is there a fuse for it


Hi Tammie, Is the coolant level low ? If not , The engine coolant level switch grounds the indicator with the coolant level in the coolant reservoir below the minimum recommended level. The engine coolant level indicator module is on the right side of the radiator just down below from the radiator cap !
Low Engine Coolant Indicator Always On

Step

Action

Value(s)

Yes

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1

  1. Disconnect the engine coolant level indicator module connector.
  2. Turn the ignition switch to the RUN position.

Is the low coolant warning indicator ON?
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Go to Step 2
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Inspect for a short to ground in CKT 68.

Does a short to ground in CKT 68?
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Go to Step 3
Go to Step 4

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  1. Replace the instrument cluster. Refer to Instrument Cluster Replacement .
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Feb 01, 2015 | 1998 Pontiac Grand Prix

1 Answer

How to flush coolant on 2004 grand prix


  • Move your badass w-body (a.k.a. Pontiac Grand Prix) to a level area and set the parking brake. Pop the hood and touch the radiator. If it's warm let it cool before you continue.
  • Twist the radiator cap one full turn (Remember to be careful because even when radiators are cool they can still erupt coolant)
  • Place any type of container (bucket [but has to be able to hold 2 gallons]) underneath the radiator and blow the drain plug. (The drain plug on your Grand Prix is on the driver's side bottom of the radiator facing the engine.)
  • Loosen the drain plug and let the old coolant to drain completely. (You may need a wrench to loosen the drain plug)
  • Dispose the old coolant in a sealable container (The coolant is very toxic to people and pets, so you gotta be careful)
  • Shut the radiator drain plug and fill the radiator with water.
  • Run car for a little bit and repeat the process again. (Let car cool, and drain water)
  • Close the drain plug and fill the radiator with fresh coolant until it's about an inch from overflowing. (DO NOT USE ORANGE DEX COOLANT IT IS HARMFUL FOR YOUR HEADGAKETS) You will need 3 gallons of coolant (SE, GT, GT1, GT2, GTP, GTP Comp G.) and 4 for the GXP model. Be sure to check the drain plug for any leakage.
  • Start your car and turn the heating system to high. Allow the car to keep running until the cooling fan turns on twice. After that happens, switch off the engine and check the coolant level. If it went down, add more coolant. If not, put the radiator cap back on and close the hood.

Feb 20, 2014 | Cars & Trucks

1 Answer

1998 grand prix low coolant light keeps coming on thermostat,hoses,radaitor,and intake gaskits have been replaced...the radaitor is full everytime i check it


If the engine is running well and not running hot, chances are that the coolant level sensor has failed. You can either replace it or ignore the warning light and just check the level as "routine maintenance"
while checking your oil and other fluids weekly as every good vehicle owner does and has done since there were cars to drive.

Mar 31, 2011 | 1998 Pontiac Grand Prix

1 Answer

The low coolant warning light stays on after


if the coolant levei is ok
then replace the low coolant sensor on the side of the rad

Nov 29, 2009 | 2000 Pontiac Grand Prix

2 Answers

How do you reset the low radiator fluid light on the dash? Fluid res. was low. I re filled but lite won't go out.


There is no reset button.When you fill it up it should just go out.What happens is the sensor is at the bottom of the fill bottle and all the dirt and junk is at the bottom.Sometimes the sensor is on the radiator.It is directly below filler neck of the radiator.Drain enough coolant to lower the level of the radiator and remove the metal retainer from the sensor.Remove the sensor and install a new one in.Refill the radiator.The light should be off.Make sure the vehicle is cooled down when working on the cooling system.

Nov 24, 2009 | 1997 Pontiac Grand Prix

2 Answers

My engine light when on in my car yesterday and my friend has one of those things that can scan and tell you whats wrong it said my coolent temp below thermistat regulating temp and where where you pull...


Hi:
Your coolant temp sensor was not reading right, and is a sensor that adjusts your eng timing. I would keep an eye on your coolant level. That would be a bigger concern, figuring out if you have a leak. If the cold comes back, you need to change out the coolant temp sensor.

Nov 24, 2009 | 2005 Pontiac Grand Prix

2 Answers

Low Coolant light


Sounds like your sensor unit in your coolant overflow tank. Like nearly everything man made that floats, they will eventually leak (become water logged). This is a relatively cheap fix, as long as the light is coming on and the coolant level in the overflow tank is between the MIN and MAX lines in the overflow tank. This means that the float in there is dropping below the actual fluid level (watter logged) and you need to get a replacement sensor unit (aka sending unit) for the overflow tank.

Otherwise, if the coolant level in the overflow tank IS BELOW the MIN level line on the tank, then you are losing coolant somewhere and that is when things start to get expensive (might be a radiator problem, head gasket, cylinder head, heater core, etc).

Jul 19, 2009 | 1997 Pontiac Grand Prix

3 Answers

I got a 1997 pontiac grand prix gtp coupe. the low coolant light constantly flashes. the coolant fluids are full. i just bought it and i am a little frustrated.


Sometimes the float in the low coolant sensor gets stuck.Find where the electrical connector is on the overflow tank and lightly tap on this area.This might dislodge it,if its stuck.Good Luck!!!

Aug 06, 2008 | 2000 Pontiac Grand Prix

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