History of General Motors General Motors announces it will cease production at the Oshawa Car Assembly in Oshawa, Lordstown Assembly in Lordstown, Ohio, and the Detroit-Hamtramck Assembly in Detroit. Two transmission plants, the Baltimore Transmission in Baltimore and the Warren Transmission in Warren, Michigan, are also expected to stop production. General Motors To Shutter Baltimore And Warren Transmission Plants Amid Cuts © GM Authority Sources: GM Authority Global News NPR
