(Used) 2006 GM/Chev (HD) 6.6L DURAMAX ENGINE ECM- Serial Number: 86YMNYJ51760112, Part Number: 12603623, Serv. Number: 12588335, YMNY, 0281011949, 18500112, 1039911198, Family Number: 6GMXH06.6591, Displacement: 6.6L, Horsepower: 300, ECS: CAC, TC, DFI, OC, EGR, Engine: P-39353, For more information about this item, give us a call.We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921