General Motors : Cadillac, Chevrolet, Buick
General Motors Company, commonly known as General Motors or GM, is an American multinational automotive corporation headquartered in Detroit, Michigan. General Motors produces cars and trucks in 31 countries, and sells and services these vehicles through the following divisions/brands: Buick, Cadillac, Chevrolet, GMC, Opel, Vauxhall, and Holden, as well as two joint ventures in China. In 2011, General Motors (GM) ranked first followed by Volkswagen and Toyoto by the International Organization of Motor Vehicle Manufacturers.