2003 Caterpillar 3126, Truck Delivery, Engine Cores, Fits to: GMC C6500, (Used) 2003 GMC C6500, ENGINE ASSEMBLY, Make: Caterpillar, Model: 3126, Horsepower: 175, AR #: 201-6314, Serial Number: CKM02496, For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) - ARR/CPL: 201-6314, Horse Power 175, Serial# CKM02496, Casting# CKM02496 1GDJ6E1C83F522431