Westfall GMC, located in Kansas City, Mo., is one of the largest dealerships in the United States for light-, medium- and heavy-duty trucks. Established more than 50 years ago, the family-based business has grown into a multiline dealership that carries GMC, Freightliner, Volvo, Isuzu, Mack and Ottawa Yard tractors. Its light- and medium-duty trucks include various models, such as GMC TopKick, Isuzu NPR and Ottawa Truck. The dealership stocks a heavy-duty line of trucks manufactured by Volvo and Mack. Its service department spans across more than 30 locations nationwide, and is staffed with company-trained and certified technicians who offer customized maintenance services, using advanced diagnostic equipment. Its parts department is open 24 hours, seven-days a week, and is housed in a more than 47,000-square-foot warehouse that carries over 70,000 parts.