For 2001-2002 Chevy Silverado 2500 HD V8 8.1L With 5/8" Trans Oil Cooler Fittings, 5 Spd; For 2001-2002 Chevy Silverado 3500 V8 8.1L; For 2001-2002 GMC B7 V8 8.1L ; For 2001-2002 GMC C6500 Topkick V8 8.1L ; For 2001-2002 GMC C7500 Topkick V8 8.1L ; For 2001-2002 GMC Sierra 2500 HD V8 8.1L With 5/8" Transmission Oil Cooler Fittings; For 2001-2002 GMC Sierra 3500 V8 8.1L ; Manufacturer Part Number: 2537, CU2537, CC2537, SBR2537, DPI2537; Interchange Part Number: 15058682, 15177266, 15193104, 52381413 Core size: 37-13/16" X 19-7/16" ; Inlet Size: 1 9/16''; Outlet Size: 1 7/8''; Transmission Oil Cooler Included: Yes; Engine Oil Cooler Included: Yes; Transmission Type: Automatic Trans. Full aluminum construction with durable, TIG-welded end tanks, increased durability over the factory plastic end tank radiator. All aluminum construction & TIG-welded craftsmanship fully. High performance design, improves cooling by 30%+ temp If you have any questions, never mind contact our friendly,helpful,and knowledgeable customer service representatives,we will be glad to address any questions or concerns promptly. Package Include: 1 X 4-Row AA5052 Aluminum Radiator Radiator Size: High Performance Racing Spec. 4-Row of tubes Core Racing Design Core size: 37-13/16" X 19-7/16" Inlet Size: 1 9/16'' Outlet Size: 1 7/8'' Transmission Oil Cooler Included: Yes Engine Oil Cooler Included: Yes Transmission Type: Automatic Trans. OEM Style Brass Petcock Drain Application: For 2001-2002 Chevy Silverado 2500 HD V8 8.1L With 5/8" Trans Oil Cooler Fittings, 5 Spd For 2001-2002 Chevy Silverado 3500 V8 8.1L For 2001-2002 GMC B7 V8 8.1L For 2001-2002 GMC C6500 Topkick V8 8.1L For 2001-2002 GMC C7500 Topkick V8 8.1L For 2001-2002 GMC Sierra 2500 HD V8 8.1L With 5/8" Transmission Oil Cooler Fittings For 2001-2002 GMC Sierra 3500 V8 8.1L