2008 GM/Chev (HD) Other, Truck delivery, Transmission ECMs, Fits to: Workhorse Custom Chassis W42, (Used) 2008 GM, TRANSMSSION ECM- Model: YNXZ, Part Number: 24239926, Serial Number: BKYNXZK180421981, Serv. Number: 242423918042, 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# BKYNXZK180421981, Casting# BKYNXZK180421981, Truck Year 2008 5b4kpd28683433983