For 2001-2005 Chevy Silverado 2500 HD/Silverado 3500; For 2001-2005 GMC Sierra 2500 HD/Sierra 3500 6.6L V8 Duramax LB7/LLY, 2001 2002 2003 2004 2005 01 02 03 04 05 Core Size: 34.06" Height x 20" Width x 1.73" Thick; Overall Size: 45.28" Length x 20.67" Width x 4.53" Height; Inlet/Outlet: 1.77"/1.77"; Transmission Oilcooler: Yes; Enginer Oil Cooler: No; Part Number: 2757, CU2757, 2510, CU2510, DPI2510 High Performance. Full AA5052 Aircraft Aluminum craftsmanship radiator & exclusive tube design that dramatically increases cooling efficiency by up to 30%~45%, strong and durable, 100% welded by TIG, No Epoxy. 100% Leak Tested Easy to Install. Meticulously built to superior OE standards for a precise fit, direct bolt-on replacement. No Drilling or Modifications Needed for Installation Crafted by our professional team using the highest-grade materials for exceptional longevity. Any problem, such as quality problems (leaking)/damaged/not received, please contact us via email first Fitment For 2001-2005 Chevy Silverado 2500 HD/Silverado 3500 5.7L 6.0L 6.6L 8.1L V8For 2001-2005 GMC Sierra 2500 HD/Sierra 3500 6.0L 6.6L 8.1L V8 Radiator Details Row Count: 3 Row Upper Inlet: 1.88in located on driver side Lower Outlet: 1.88in located on passenger side Surface Finish: Includes CNC machined filler neck and cap OEM style brass petcock drain CNC machined filler neck and cap Part Number Manufacturer Part Number:89018318, 15170203