General MotorsˌGeneral ˈMotors trademark (abbreviation GM) 
one of the world's largest car companies, which is based in the US and has factories in many countries. Its makes (=types) of cars and trucks include Chevrolet, Cadillac, Oldsmobile, Pontiac, and Buick, and in Europe, Opel and Vauxhall.
one of the world's largest car companies, which is based in the US and has factories in many countries. Its makes (=types) of cars and trucks include Chevrolet, Cadillac, Oldsmobile, Pontiac, and Buick, and in Europe, Opel and Vauxhall.