2000 GM/Chev (HD) 7.4 L, l, ECMs, Fits to: GMC C6500, (Used) 2000 GM/Chev (HD) 7.4L ENGINE ECM- Part Number: 16238212, Serial Number: 86DAFMM001602Z78, HDW NO: 16239740, Engine information- Model:7.4L gas V8, Family Number: YGMXH7.4502, Serial Number: YJ907742, 2 Rectangular Plug with 80 Pins each, Reference images for condition. For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921, Serial# 86DAFMM001602Z78, Casting# 86DAFMM001602Z78, Truck Year 2000 1gdg6h1b1yj907742