0 GM/Chev (HD) 4.8, , ECMs, Fits to: , (Used) Chevrolet 4.8L ENGINE ECM- Serial Number: 86AAF7K29035WUCW Part Number: 12633238 Service Number: 12633238 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# 86AAF7K29035WUCW, Part# 12633238,