Use the XDP Xtra Cool Direct-Fit Replacement Radiator XD297 to upgrade the failed radiator in your 2006-2010 GM 6.6L Duramax LBZ & LMM. The Xtra Cool Radiators are built for increased durability over your factory radiator. Using construction techniques borrowed from the HD and semi-truck industry, Xtra Cool Radiators give you a long-lasting direct-fit upgrade to protect your engine and cooling system. High-Efficiency Core DesignWith more fins per inch, and heavy duty tubes to increase cooling efficiency, the upgraded core design allows you to maximize cooling potential of your Duramax.Internally ReinforcedUsing a special aluminum brazing technique, the Xtra Cool Radiators are built for increased strength. The internally reinforced end tubes and outside corners provide more strength where the core is most vulnerable. Gasket DesignA common failure point in many OE radiators, Xtra Cool Radiators use a proprietary gasket that allows for contraction, expansion, and front-end movement. Revised End TanksUsing a fiber reinforced plastic mix adds strength to the end tanks. Reinforcement ribs are added to the weak points to help eliminate end tank failures.Upgraded Mounting PointsThe integrated mounting points have been updated for added strength. This allows for the radiator to be securely mounted in the factory locations. End Tank/Core AssemblyXtra Cool Radiators use a heavy gauge steel crimp strip to mate the core to the end tanks. Instead of using aluminum like the factory radiator, the heavy gauge steel helps to eliminate the common failures of tank and core separation. Features:Direct-Fit Upgraded Design For Increased DurabilityHigh-Efficiency Core To Maximize Cooling XD297 Specifications:Row Quantity: 2Core Width: 33-7/8" Core Height: 23-1/4" Core Thickness: 2-1/4"Inlet Connection: 1-3/4"Outlet Connection: 2" (Quick Connect)Trans Oil Cooler: Quick Connect Fittings OEM Part# 15102152, 15122835, 15914079WarrantyAll product warranties if any, implied have been done so at the discretion of the manufacturer. If you need warranty assistance on any product you've purchased, please contact the manufacturer directly.Products manufactured by XDP carry a 2-Year warranty against defects in materials and craftsmanship. The Warranty is Limited to two (2) years from the date of sale and limited solely to the parts contained within the product's kit. All products that are in question of Warranty must be returned shipping prepaid to XDP and must be accompanied by a dated proof of purchase receipt. Warranty is limited to the original purchaser.Under no circumstances shall the Xtreme Diesel Performance, LLC. be liable for any labor charged or travel time incurred in diagnosis for defects, removal, or reinstallation of this product, or any other contingent expenses.Vehicle Fitment YEAR MAKE MODEL FOR ENGINE SERIES 2006 Chevrolet Silverado 2500 HD 6.6 2007 Chevrolet Silverado 2500 HD 6.6 2008 Chevrolet Silverado 2500 HD 6.6 2009 Chevrolet Silverado 2500 HD 6.6 2010 Chevrolet Silverado 2500 HD 6.6 2007 Chevrolet Silverado 2500 HD Classic 6.6 2006 Chevrolet Silverado 3500 6.6 2007 Chevrolet Silverado 3500 Classic 6.6 2007 Chevrolet Silverado 3500 HD 6.6 2008 Chevrolet Silverado 3500 HD 6.6 2009 Chevrolet Silverado 3500 HD 6.6 2010 Chevrolet Silverado 3500 HD 6.6 2006 GMC Sierra 2500 HD 6.6 2007 GMC Sierra 2500 HD 6.6 2008 GMC Sierra 2500 HD 6.6 2009 GMC Sierra 2500 HD 6.6 2010 GMC Sierra 2500 HD 6.6 2007 GMC Sierra 2500 HD Classic 6.6 2006 GMC Sierra 3500 6.6 2007 GMC Sierra 3500 Classic 6.6 2007 GMC Sierra 3500 HD 6.6 2008 GMC Sierra 3500 HD 6.6 2009 GMC Sierra 3500 HD 6.6 2010 GMC Sierra 3500 HD 6.6