GM maps all-electric future with 20 models arriving by 2023

General Motors joined a growing group of automakers promising an emissions-free future for cars by pledging to sell 20 all-electric vehicles by 2023.The largest U.S. automaker, which generates most of its profit with large sport utility vehicles and pickup trucks, plans to have a lineup of both battery-powered cars and hydrogen fuel-cell autos, which also run on electricity. Two new EVs will debut in the next 18 months to follow the Chevrolet Bolt that’s been on sale for less than a year.&