There aren't many of us here that take as great care of their cars than Don. I'd be willing to bet you he checks his fluids weekly in both Bonnevilles. That seems to be the key to successful Dexcool use. Vigilance.

would there be any adverse effects from flushign and swithcign to green? see i have a small leak in my radiator so like it or not i get air in there, and if i supposedly cant use a stopleak with dexcool, then i should switch to green and use a stopleak, right?

You can use a sealant. Use GM sealant tabs (cooling system suppliment). Get them at the dealer or use product "HDC" (same as dealer product) or the powdered version "G12BP" in the following link.
http://www.barsproducts.com/origin.html