(Used) 2008 GMC (AT), TRANSMISSION ECM- ECM Model: YNXS, Trans Model: 4L80E, Part Number: 24239926, Serial Number: BKYNXSK073170672, 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