GM plans the reveal of a Cadillac electric vehicle for April, the first full look at a GMC-branded Hummer EV in May, and more details about its electric-vehicle underpinnings in March. Ahead of that EV push, GM is clearly covering its bases for current drivers of the Chevrolet Bolt EV—as well as, perhaps, those future products. Through the…GM plans the reveal of a Cadillac electric vehicle for April, the first full look at a GMC-branded Hummer EV in May, and more details about its electric-vehicle underpinnings in March. Ahead of that EV push, GM is clearly covering its bases for current drivers of the Chevrolet Bolt EV—as well as, perhaps, those future products. Through the…GM plans the reveal of a Cadillac electric vehicle for April, the first full look at a GMC-branded Hummer EV in May, and more details about its electric-vehicle underpinnings in March. Ahead of that EV push, GM is clearly covering its bases for current drivers of the Chevrolet Bolt EV—as well as, perhaps, those future products. Through the…GM plans the reveal of a Cadillac electric vehicle for April, the first full look at a GMC-branded Hummer EV in May, and more details about its electric-vehicle underpinnings in March. Ahead of that EV push, GM is clearly covering its bases for current drivers of the Chevrolet Bolt EV—as well as, perhaps, those future products. Through the…