2012 GM/Chev (HD) 4.8, TRUCK DELIVERY, ECMs, Fits to: Workhorse Custom Chassis W42, (Used) 2011 GM/Chev (HD) 4.8, ENGINE ECM - Part Number: 12633238, Serial Number: 86AAF7K27143U6HY, Family Number: AGMXE04.8581, Displacement: 4.8L, Horsepower: 285, Part Number: 52H0D285A, Serial Number: 52121D053, Engine: P-49171 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# 86AAF7K27143U6HY, Truck Year 2012, VIN 5B4KFD2D9C3449345 5B4KFD2D9C3449345