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Guest
Are you switching out your "pink" anti-freeze for the good green stuff after warrantee is up? Most car talk shows are saying to dump the GM Dexicool ASAP for the more traditional green coolant made for the newer GM engines. The Dexi is said to gum up the works after many miles of heat and driving. I've got 66000 on my 03 Express, and it still seems to cool well, and the coolant isn't sludgy.