Founded in 2008, Johnson Truck Center is a fully authorized freightliner dealer, serving mainly southern Maryland and northern Virginia. The company provides authorized parts and maintenance support for Sterling, Western Star, Alliance Parts, Cat and Cummins. It offers a host of services, such as driveshaft, flywheel machining, air-conditioning and refrigeration system maintenance, glass/tire repair, transmission/differential welding, hydraulic as well as radiator maintenance. In addition, Johnson Truck Center provides diagnostic service, federal inspections and smoke testing services, customer tailored maintenance programs. The inventory comprises freightliner trucks, new vehicles and preowned vehicles.