General Motors Company is an American multinational automotive corporation headquartered in Detroit Michigan and the world's second-largest automaker. GM employs 209 000 people in every major region of the world and does business in some 157 countries. 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.