2004 GM/Chev (HD) 6.6L DURAMAX, , ECMs, Fits to: , (Used) 2004 GM/Chev (HD) 6.6L Duramax ENGINE ECM- Part Number: 12210729, 15166852, Serial Number: 86DRUJM322135NKV, HDW No: 12209950, 2 Rectangular Plug with 80 Pins each, 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# 86DRUJM322135NKV, Casting# 86DRUJM322135NKV, Truck Year 2004