Will it hurt to flush the dex cool out of my radiator and put regular anti-freeze in it. The color of the dex cool is orange and I want to put in the green antifreeze. 1996 Lumina had trouble with the dex cool. There was a law suit going on for a very long time. It claimed that the orange antifreeze made gaskets to fall apart.

Well, a 50-50 solution of any good green AF is okay, unless you have the dex-cool, orange colored, GM brand type of AF... If you have that, you want to use orange again. You cannot mix dex-cool with regular green AF (like Prestone or any brand AF that is green colored). A lot of people don't like using dex-cool so they change to regular AF. But to do so, you need to flush out every trace of the dex-cool. If they get mixed, problems like sludge in the coolant may result.

they say you cant mix different coolants but you can go to auto-zone etc, and buy a cheaper anti-freeze for general motors products. its a 50/50 mix for all gm cars and trucks.you can add this coolant to any brand of anti-freeze. its called universal type anti-freeze. to run a differant anti-freeze in it, you have to flush out complete engine and radiator because the dex-cool and the green stuff do not mix well and cause engine corrosion etc. dex-cool is reccomended for all chevy engines. good-day !

rad/cooling system not serviced.dex cool will sludge up.entire ststem needs to be flushed
adding regular anti freeze to a dexcool system will also do this

need to have it looked at sounds like the motor is knocking not what you want to here

WATER PUMP FAILURE COULD BE CAUSED BY WRONG COOLANT USE DEX COOL ANTI FREEZE.REPLACE THERMOSTAT AND BOTH RADIATOR HOSES TOP HOSE AND BOTTOM HOSE.SOFT HOSES COLAPSE LIKE PUMP HOSE.IT WILL COLAPSE FROM PUMP VACUUM CLOSING OFF SOME COOLANT FLOW.MAKE THE HEATER CORE NOT STOPPED UP IF SO IT WILL RESTRICT WATER PUMP BYPASS CAUSE EARLY PUMP FAILURE.YOU NEED 50/50 COOLANT MIXTURE YOU HALF WATER AND HALF DEX COOL DONT USE GREEN ANTI FREEZE USE ORANGE DEX COOL.I HAVE 3.4L ENGINE AND 3.1L ENGINE BEEN USING DEX COOL ANTI FREEZE SINCE I HAD BOTH VECHICLES. HAD NO WATER PUMP PROBLEMS.

Hate to tell you but it sounds like you have a blown upper or lower intake manifold gasket. This is a very common problem with these cars. I have had mine replaced twice in 150.000 miles. It has been recalled a couple of times 4 or 5 years ago. Its not a cheap fix it ran me about $800 to have them both replaced. If this is found to be the problem when your having it fixed have the garage working on it flush out the complete cooling system of the Dex-col type anti-freeze so it can be filled with regular anti-freeze when there done. Dex-col anti-freeze is the biggest reason these gaskets fail. It eats through and breaks down the gasket over time. But its best to have a garage flush out the system due to the fact the two types of anti-freeze cant be mixed at all or it will turn to a gummy substance and clog up and ruin water pumps , radiators, and heater cores but flushing the system good will keep from any small amount of Dex col being left in the system. In my opinion the regular anti freeze keeps the engine cooler and is twice as cheap not to mention that its gasket friendly

the red/orange Dex Cool is the correct antifreeze

however, many manufactures no use a universal fluid that is clear

this fluid meets and/or exceeds all manufactures recommendations so you will be fine

let me know if I can be of any further assistance!

nothing they are all the same ,just use pure eythelene glycol and no diluted solutions ,you cannot hurt the vehicle with neat antifreeze in it

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

I have heard the same. I have been told to go with the green. Have not heard of any issue in replacing with green vs. orange. Nothing has been posted anywhere that I have seen.