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Re: Is DexCool bad?
My 99 Yukon had it in the system when I bought it. It had 69K on it and the intake gasket was bad as well as the waterpump. Chevy garage did the repairs under an aftermarket type warranty. Before the repairs were done I changed out the red for green, what I found out is that the red and the green DO NOT mix, the red (dex-cool) is lighter and floats to the top in the radiator. When under pressure it goes to the overflow bottle first draining it off and replacing it with green was easy, and yes it all came out. By the way the Chevy garage blamed my change for the bad gasket and water pump...BULL. I have since put another 60k on it with no trouble at all.
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