The Truck Equipment & Parts-Used-Rebuilt (Wholesale) industry involves the buying and selling of used and rebuilt parts for trucks. These parts can include engines, transmissions, axles, brakes, and other components that are necessary for the operation of a truck. Companies in this industry typically purchase used parts from salvage yards or other sources, and then rebuild them to ensure they are in good working condition before selling them to customers. This industry plays an important role in the trucking industry, as it provides a cost-effective alternative to purchasing new parts.