2010 GM/Chev (HD) 4.8, Truck Delivery, ECMs, Fits to: Workhorse Custom Chassis W42, (Used) 2009 GM/Chev (HD), ENGINE ECM- Model: E38, Part Number: 12635858, Serial Number: 86AAKAK201274V5S, Serv. Number: 12633238, 1 Rectangular Plug with 73 Pins, 1 Rectangular Plug with 80 Pins, 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# 86AAKAK201274V5S, Casting# 86AAKAK201274V5S, Truck Year 2010 5B4KFD2D7A3441158