It's time to do a water pump and hoses so i figured a coolant flush wouldn't hurt. I'm thinking about ditching the Dexcool and going to G-05. That's what I put in the wife's van after a flush and I have two extra gallons on hand. It's more expensive but it would be convenient to use just one product. I had what I am thinking was a Dexcool issue when I bought the truck last year. Mud in the reservoir, silted up coolant passages, etc. Being an idiot, I managed to crack my lower intake manifold when changing out the temp sensor. Might have been a blessing in disguise because the gaskets showed signs of deterioration when I pulled the LIM off. I just went ahead and put all new DEX and distilled water back in when I buttoned it up. I figure that's what it was designed to use, etc. Reading up on coolant formulations is enough to make a man's head spin. I'm just wondering if anyone has a specific reason to avoid G-05 or any reason to stick with Dex. I had read one account of a guy claiming his temps went up 20* on G-05 but who knows.