LB7 and LLY intercoolers leak at the tank seam, and the engine loses boost as soon as the crack opens under load. Replace it with the CSF 6007. This is the tube-and-fin aluminum cooler for 2001-2005 Silverado and Sierra HD trucks.

• Build: Tube-and-fin aluminum core, 37-1/2 inches by 18-3/8 inches and 1-7/8 inches thick, with 3-inch inlet and outlet tubes.
• Part number: CSF 6007 crosses OEM 15020380 and 19258551.
• Fitment: 2001-2005 Chevrolet Silverado 2500 and 3500 and GMC Sierra 2500 and 3500 with the 6.6L Duramax LB7 or LLY.
• Does not fit: 2006-up LBZ, LMM, LML, and L5P trucks. The heavy-duty bar-and-plate cooler for these same years is CSF 7103.
• Not in the box: Boots, hoses, and clamps are not included. This is the intercooler core only.
• Warranty: CSF lists a 1-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 engine is an LB7 or LLY, 2001-2005, before you order.