2010 GM/Chev (HD) 4.8, Truck Delivery, ECMs, Fits to: Workhorse Custom Chassis W42, (Used) 2009 GM/Chev (HD) 4.8, ENGINE ECM- ECM Model: E38, Part Number: 12633238, Serial Number: 86AAF7K24074M0MT, 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# 86AAF7K24074M0MT, Casting# 86AAF7K24074M0MT, Truck Year 2010 5B4JFD2D0A3441708