When the Hummer EV SUT (sport utility truck) and its newly-unveiled SUV variant hit dealer show floors in the fall of 2021 and 2023, respectively, they’ll be among the first models in GM’s new electrified lineup to be built atop the company’s Ultium battery system. General Motors is no stranger to the electric vehicle market. GM began its electrified venture in 1996 with the EV1, one of the very first viable battery-powered sedan models produced by a major automaker which continued its run until being discontinued in 2003. It was superseded by the BEV2 platform of which the 2016 Chevy...