2000 Allison AT545, Truck Delivery, Transmission Assys, Fits to: GMC C6500, (Used) 1999 Allison, TRANSMISSION ASSEMBLY- Model: AT545 Serial Number: 3211010644, Part Number: E003809, Engine Model: Gm Chev V8, 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# 3211010645, Truck Year 2000, VIN 1GDE6H1B5YJ900011 1GDE6H1B5YJ900011