Power-only trucking is a method for transporting freight where a carrier provides the semi-tractor and truck driver also called a “power unit” needed to haul a shipment but not the trailer it’s resting on. In many cases, power-only trucking provides a convenient solution for shippers who either own or lease the fleet of trailers theyuse to move outbound freight. The process of employing power-only trucking for each shipper is really quite simple.