Can u put dex merc in a 2003 pontiac grand am 2.2liter?

What color is the old coolant ? Your vehicle came with Dex-Cool an you don't want to mix it with any other type . Can cause major problems , plugging up the heater core , water passages in the engine , radiator etc.... You would need to power flush the cooling system before using someother types . The Dex-cool is orange .

Try a local "Jiffy Lube" as they should know correct type and keep your receipt if you use them as they should have warranty/guarantee as well.

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Thermostat stuck open , heater core plugged ! Have you had the cooling system flushed ? Does your coolant look like a muddy color instead of dex-cool orange , you haven't mix green coolant with dex-cool - GM coolant , that would clog the cooling system up .

You are leaking water into the oil. You should also find that you are having to add water to the coolant. If you are lucky, this will be a head gasket problem. Could be that the head bolts are loose. Even if this is the issue the leaking gases have most likely damaged the gasket.

Jim

Transmission Fluid---Dex/Merc

Do not use power steering fluids, found in the parts store, or any product, for any application with a sealer.

NO SEALERS

Use what your vehicle was designed for

You should flush your P/S Fluid every 3 years
That alone will not correct a problem

EP90 or EP80'

youve replaced the thermustat in your car

your car may be air locked

remove the cap for the coolent bottle and let the car run for a bit you should get bubbling and a boiling sound comming from the bottle

worning: hot liquid dont stand too close while the bubling is going on wate till it stops then shut off the car

(keep a close eye on the temp gadge while the car is running after the air has bubbled out if thecoolent is low replace with the rite coolent

with any pontiac/chev vehicle its usually "DEX-COOL" its usually orange in color (dont put in the green stuff youll ruen your moter) if it calls for the other coolent (the green stuff) put that in and not the orange stuff

i hope this helps you i hope you get your car fixed

I found out the hard way -this is soooo important. It is imperative that you use the orange dexcool. it is designed to withstand certain temperature. If not used properly - it could start a domino effect thats very costly. T.M.I One time i let my boyfriend check my oil- simple enough right? like most people do, the water level was checked as well. he filled reserve w/ plain water all the way to the top ( instead of where coolant level line is) The results were over heating (plus found out later after melted heads) that the threads to reserve cap were stripped. which is what lead to lake of pressure in coolant line.

yes,your guy is right,a lot of gm cars have the int. gasket problem because of dex.

Bad News. I recently had the same type of smell ( no leaks or puddles either) coming from my van and had to have the intake manifold gasket replaced due to the Dex-cool issue. It appears GM installed an inadequate/substandard gasket when they built the van. My van only had 65,000 miles on it. There's a Dex-cool settlement you could have applied for but repairs had to be made by May of 2008.

This is the only real complaint I've had with the van.