General Motors Company, one of the worlds largest automakers, traces its roots back to 1908. With its global headquarters in Detroit, GM does business in some 140 countries. GM and its strategic partners produce cars and trucks in 34 countries, and sell and service these vehicles through the following brands: Buick, Cadillac, Chevrolet, GMC, GM Daewoo, Holden, Opel, Vauxhall and Wuling. GMs largest national market is the United States, followed by China, Brazil, the United Kingdom, Canada, Russia and Germany. GMs OnStar subsidiary is the industry leader in vehicle safety, security and information services.