In this Jan. 12, 2015 file photo, General Motors CEO Mary Barra talks about the 2016 Chevrolet Volt hybrid car at the North American International Auto Show, in Detroit. General Motors on Thursday, Oct. 1, 2015 told investors it plans to cut $5.5 billion in manufacturing, purchasing and administrative costs during the next three years, helping to finance a big push into autonomous cars and car- and ride-sharing services.