(Used) GM/Chev (HD), ECM- Serial Number: 86YPUHR171930441 Part Number: 12623264 Model: YPUH HDW Number: 12589161 Serv Number: 12602801 For more information about this item ,give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY ELKTON, MD 21921