(Used) GM/Chev (HD), ECM- Serial Number: 86YPUHR171990260, Part Number: 12613264, Model: YPUH, SERV. Number: 12602801, HDW Number: 12589161, For more information about this item,give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921