(Used) GM/Chevy (HD) 6.0L, ENGINE ECM - Part Number: 12589463, Serial Number: 86YHZS90428160LA Service Number: 12589162, Engine Information- Displacement: 6.0L Horsepower: 360, 2 Rectangular Plugs 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