How does Dexcool work? I hae flushed older GM cars and trucks with the green stuff that you mix 50/50 with water but I have never touched the newer Dexcool/pink stuff. Do you still drain the radiator and flush with the garden hose and then refill with 100% dexcool or mix 50/50 with water? What is the best way to do a flush at home? It is on a 2002 Camaro and 2003 Silverado. Thank you!