The 2011-2016 LML Duramax radiator leaks at the tank or lets both engine and transmission temps climb when the core is tired. Replace it with the CSF 3584. The core is about 8 percent thicker than the factory core, at 52 mm versus 48 mm, and it keeps a plate transmission cooler in the tank.

• Build: Two rows, 27-1/2 inches by 33-7/16 inches and 2-1/16 inches thick, which is the 52 mm core.
• Transmission cooler: An 11-1/2 inch high-efficiency plate cooler with quick-connect oil-cooler fittings.
• Pipes: Quick-connect outlet. Coolant inlet is 1-13/16 inch on the left and the outlet is 2 inches on the right.
• Tank: Glass-filled plastic tank and EPDM seals, leak-tested at 150 percent of operating pressure.
• Part number: CSF 3584 crosses OEM 23172440 and 25838892.
• Fitment: 2011-2016 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 with the 6.6L LML Duramax.
• Does not fit: 2017-up L5P trucks. The 2017-2019 primary is CSF 3843 and the 2020-up primary is CSF 3928.
• Not in the box: The radiator cap is not included, and the hoses and clamps are not in the box.
• Warranty: CSF lists a 2-year limited warranty for the original owner. The term is on the warranty card in the box.

Order today to secure your replacement. Confirm the truck is a 2011-2016 2500HD or 3500HD with the LML before you order.