Keep the cooling system in your 2004.5-2005 Chevy/GMC 6.6L LLY Duramax working properly with a new radiator. A radiator serves as a type of heat exchanger and as hot coolant flows through it, the outside air passes over the radiator fins allowing heat to dissipate. Over time your factory radiator can require replacement due to leaks, clogs, front-end collisions, and many other reasons. Get the high-quality replacement Radiator your vehicle needs from manufacturers including XDP X-TRA Cool, Mishimoto, CSF, AFE, and Flex-A-Lite. Shop today at XDP and ensure that your radiator is up to the task and can handle the heat!