2-Row AA5052 Aluminum Radiator - Direct OE Replacement for 2011-2016 Chevy Silverado/GMC Sierra 2500HD/3500HD 6.6L Duramax LML, Replaces OEM# CR13399 25838892 23172440

Compatible with: 2011-2016 Chevy Silverado 2500HD 6.6L Duramax LML 2011-2016 Chevy Silverado 3500HD 6.6L Duramax LML 2011-2016 GMC Sierra 2500HD 6.6L Duramax LML 2011-2016 GMC Sierra 3500HD 6.6L Duramax LML Radiador Size: High Performance Racing Spec. 2-Row of tubes Core Racing Design Core Height (in): 27.89" Core Length (in): 33.46" Inlet Size ：1 7/8" Outlet Size: 2" OE/OEM Part Number: CR13399, 13399, 25838892, 23172440 Manufacturer Part Number: CU13244, CR13399, CU13399 Package Include: 1 X 2-Row AA5052 Aluminum Radiator

• Premium AA5052 Aircraft-Grade Aluminum Construction--Crafted with full AA5052 aluminum core and tanks—an Al-Mg alloy widely used in aircraft fuel tanks for superior corrosion resistance, 1.5x higher strength than pure aluminum, and excellent thermal conductivity (130-150W/(m·K)) . 2-row racing-spec tube design with dense fins maximizes heat dissipation area, outperforming stock radiators prone to plastic tank cracks and leaks . Raw aluminum finish ensures long-lasting durability in harsh working conditions (towing, off-roading, extreme temperatures)
• 30%-45% Enhanced Cooling Efficiency--High-performance 2-row core (27.89"H x 33.46"W) delivers 30%-45% better cooling than OEM radiators , effectively preventing engine overheating during heavy loads, hauling, or long highway drives. 1 7/8" inlet and 2" outlet optimize coolant flow, keeping the 6.6L Duramax LML engine running at optimal temperature for peak performance and reduced wear
• Direct OE Drop-In Fit & Hassle-Free Installation--Precision-engineered to match OEM specifications (replaces CR13399, 13399, 25838892, 23172440) with exact core and overall dimensions. No drilling, cutting, or modifications needed—directly fits original mounting points and hardware . Ideal for DIY enthusiasts: install in minutes using basic tools (socket set, hose clamp pliers) by following reverse removal steps , saving time and labor costs vs. dealership replacement
• 100% Tested for Reliability & Durability--Every unit undergoes rigorous leak testing and durability trials to meet OE performance standards . Heavy-duty design withstands vibration, pressure, and temperature fluctuations, addressing common stock radiator issues (clogs, leaks, core failure) . TIG-welded seams (no epoxy) ensure leak-free performance, while the robust AA5052 construction resists rust and corrosion for extended service life
• Wide Compatibility with 2011-2016 HD Models--Perfectly fits 2011-2016 Chevy Silverado 2500HD/3500HD 6.6L Duramax LML and 2011-2016 GMC Sierra 2500HD/3500HD 6.6L Duramax LML. Compatible with all submodels (LT, LTZ, High Country) and works seamlessly with factory cooling systems—no compatibility issues with fans, hoses, or transmission coolers . Package includes 1x 2-row AA5052 aluminum radiator (manufacturer part numbers: CU13244, CR13399, CU13399)