GM Chief Executive Mary Barra told investors last week that the automaker intended on accelerating production of their electric vehicles, aiming to deliver 400,000 EVs in North America during 2022 and 2023, with Hummer EV reservations topping nearly 59,000 hand raisers alone. The Chevrolet Silverado EV, another 110,000 reservations. For that to happen, production rate would need to turn up rapidly from the cautious pace we’re seeing today. Particularly for the GMC Hummer EV. According to Reuters, details shared with suppliers indicate that GM intends to increase production of both the Hummer E…