GM promises that its redesigned 2016 Chevrolet Volt will go 30% farther on an single electrical charge than the current model. Bloomberg News General Motors Co. is readying a one-two punch in the electric-car market, hoping to emerge from the shadow of Tesla Motors Inc. Later this year, GM plans to introduce a next-generation Chevrolet Volt that sports a new exterior design and room for five passengers. More important, it promises that the redesigned 2016 Volt will go 50 miles on a full charge, 30% farther than the current model. Like its predecessor, the new Volt automatically switches to gasoline when its charge is depleted. The total range of the new model, using gas and electricity, will be 420 miles. The auto maker also intends to launch a $30,000 all-electric vehicle in 2017 called the Chevrolet Bolt, which would be capable of driving 200 miles on a single […]