If they are actually the same, truckwise, and it will communicate with the ECM, it should at least start and maybe drive. Ultimately I think it will need to be mated to your truck. What you may think is the same truck may not be the TCM's idea of the situation. Try it and let u know how it works out
2 trucks with the same vin#? Not so sure about that. It has happened; some have purchased a new truck with a duplicate vin#, and they find that out when they attempt to register the truck.