Swap out the leaking radiator in your 2006-2007 Chevy/GMC 6.6L LLY/LBZ Duramax with a new durable replacement. Over time your stock radiator will need to be replaced either due to leaking, becoming clogged up, or the plastic inlets and outlets can break from constant clamp pressure. Shop now at XDP and ensure you replace your radiator with a unit that can stand up to the heat! Get the high-quality replacement Radiator your vehicle needs from manufacturers including XDP X-TRA Cool, Mishimoto, CSF, AFE, and Flex-A-Lite. A radiator functions as a heat exchanger and as hot coolant flows through the core, outside air passes through the radiator fins helping to dissipate heat.