The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - What is the best rad flush for '05 Chevy?

**Boog** · 07-09-2011, 06:18 PM

I'd trust the Prestone rad flush and I also trust Dupont products.
After having the heater core plug up twice in the 2 years I've owned my 2000 GMC while having dexcool in it I said enought is enough. Both times I reverse flushed the core with a garden hose and plugs of mud shot out of it. Couldn't understand why it did this since it has a tight system and never lost coolant so no air present to cause it to mud up.
It's then when I flushed the system real good and put the green in it. No more red for me. Bugs me that I couldn't get that stain out of the coolant tank too.

07-09-2011, 06:18 PM	#10
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,682	Re: What is the best rad flush for '05 Chevy? I'd trust the Prestone rad flush and I also trust Dupont products. After having the heater core plug up twice in the 2 years I've owned my 2000 GMC while having dexcool in it I said enought is enough. Both times I reverse flushed the core with a garden hose and plugs of mud shot out of it. Couldn't understand why it did this since it has a tight system and never lost coolant so no air present to cause it to mud up. It's then when I flushed the system real good and put the green in it. No more red for me. Bugs me that I couldn't get that stain out of the coolant tank too. __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross