(Used) 2008 GM/Chev (HD) (AT) , TRANSMISSION ECM- ECM Model: YNYS, Serial Number: BKYNYSK090340713, Part Number: 24240449, Model: 4L80E, Serial Number: 19207892, Part Number: 24208421, Engine: GM/Chev (HD) 6.6L DURAMAX, Pin Plug: 49 Pins, Rectangular Plug For more information about this item, give us a call. We ship Worldwide! (CRG HEAVY TRUCK PARTS) 929 W PULASKI HWY, ELKTON, MD 21921