2021 GM/Chev (HD) 6.6L, Truck Delivery, Engine Assys, Fits to: Isuzu NPR-HD, (Used) 2021 GM Gen V LT 6.6 ENGINE ASSEMBLY, Family Number: MGMXE06.6001, Displacement: 6.6L, Horsepower: 401, Serial Number: 145Y3502, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921, Horse Power 401, Serial# 145Y3502, Casting# 145Y3502 54DC4W1DXMS200962