Money 1,000-hp GMC Hummer electric SUV to roll out of Detroit assembly plant in 2021 January 31, 2020 Mark Phelan, Detroit Free Press Comments Off on 1,000-hp GMC Hummer electric SUV to roll out of Detroit assembly plant in 2021 GMC's 1,000-hp Hummer electric SUV will combine Hummer's immediately recognizable looks with a zero-emission electric drivetrain.