A control system having a controller is configured to operate a vehicle indexing system that moves one or more vehicles in a vehicle system into a position to one or more of unload cargo off of the one or more vehicles or load the cargo onto the one or more vehicles. The controller is configured to determine a power setting of the vehicle indexing system that is used by the vehicle indexing system to move the one or more vehicles in the vehicle system into the position. The controller also is configured to determine a vehicle power setting for the vehicle system based on the power setting of the vehicle indexing system for controlling the vehicle system to provide additional tractive effort to the vehicle indexing system to move the one or more vehicles into the position.