Question about 1996 Pontiac Grand Prix

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1996 Pontiac Grand prix Coolant problem.

My son kept getting the coolant light on along with the check engine light. He bought some coolant/antifreeze and poured it in. It turned thick and goooey, and yellow. Then it overheated when the weather got cold. Who can tell me what happened and how to fix this mess ? I don't even know what kind he bought. The bottle was Prestone.

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  • Daniel Arellano
    Daniel Arellano Dec 18, 2008


  • christiana12 Jan 16, 2009

    I am having problems with my Grand Prix the low coolant light came on and we put the peeks anti-freeze into it immediatley the next day the thermostat was jumping from 150-290 spontaniously and the heater stopped working.

  • Daniel Arellano
    Daniel Arellano Feb 01, 2009

    I changed the thermostat. And Changed the temperature control sensor. Because the fans were not coming on. That fixed the problem. But the overheating damaged the intake gaskets. Had to replace all the intake gaskets. Reflush the engine and fill with fresh coolant. it seems to be working fine now. Thanks for your help.

  • kenworth1009 Feb 20, 2009

    96 grand prix 3.1 ltr temp gauge fluctuates from about 150- 260 even way over the high point for the gauge then it will drop back down then it will be fine for a while along with the heat loss did put in a new radiator with the correct coolant



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The car came with GM dexcool in it and was mixed with a noncompatable antifreeze. You need to flush to entire cooling system including the heater core. Any Certified shop can handle this job and recycle the used fluid. As for the Ck engine light only a scan can tell you if it is related or not.

Posted on Dec 18, 2008


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2 Answers

How are you supposed to add antifreeze to a 1997 Pontiac Grand Prix

the plastic jug is an overflow container when the vehicle gets warm excess coolant from the radiator flows to it there is a sensor somewhere on the jug or in it for coolant level if it doesnt hold coolant it is most likely cracked as it is only plastic and should be replaced

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99 grand prix liquid capacities? coolant and oil

Get the premixed antifreeze inwhich no measuring is involved, just pour it in. if using the old concetrated stuff add 1.6 gallons of coolant then the rest bottled water. Tap water has minerals in it which rot the radiator's core out quicker. The engine oil is 4.5 quarts with filter

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2005 pontiac grand prix just changed by pass coolant hoses and filled Radiator,Overflow with coolant now engine is hesitateing and check engine light is on.

Go somewhere and get codes retrieved and see what they are you could have bumped a connector or broke a sensor while doing repairs. Also double check did you disconnect any connectors?

Dec 24, 2011 | 2005 Pontiac Grand Prix

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Where is the thermostat located on a 1996 pontiac grand prix, engine is a 3.1


Feb 14, 2011 | 1996 Pontiac Grand Prix

1 Answer

What kind of antifreeze do i use for a 2006 grand prix

Your car was likely manufactured with GM DEX-COOL coolant. If it has been changed to universal you may use any universal coolant.

If the coolant in the coolant reserve tank is orange you should use genuine DEX-COOL which should be able to get from your local auto parts supplier.

All the best.

Nov 21, 2010 | 2002 Pontiac Grand Prix

1 Answer

The heat light stays on even after i filled it

Do you mean coolant light when you say "heat" light? I assume you filled the coolant or antifreeze? If so, you need to check the reservoir as well as the radiator. Remove the cap when the engine is cold and fill it to the top with a fresh mixture of antifreeze and water.

Jul 06, 2010 | 1996 Pontiac Grand Am

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My car is leaking antifreeze onto the ground under the reserve tank. It is not overheating and of course after the coolant has leaked out my low coolant light comes on. I added more but there was still...

If your coolant light turn on sometimes, and you can check that your coolant level is low, definitly you have a leak.

I suggest check this artricle about how to detecting coolant leak

Hope this help (remember rated and comment this).

Mar 26, 2010 | 2002 Pontiac Grand Prix

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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

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Replaced headgaskets on 95 grand prix 3.4 now overheating

did you by accident put the head gaskests on the wrong side, because they are different, the head blot pattern will line up but the water jacket ports ares lightly different, you may have blocked off cooling ports tot he cylinder heads which will cause the overheating condition you speak of...

Aug 11, 2009 | 1995 Pontiac Grand Prix

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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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