A burgeoning risk of a supply crunch in cobalt -- a key battery metal that has more than tripled in price in two years -- poses one of the biggest threats to forecasts for rising electric vehicle adoption.
GM is doubling the number of engines available on the retooled 2019 Chevrolet Silverado and GMC Sierra, including a new four-cylinder turbocharged engine that can run on two cylinders to increase fuel economy. The 2.7-liter, I-4 turbo is a milestone for the company and industry.
Fires on electric vehicles are rare, but the volatile chemistry of their batteries and the need for special training on how to extinguish them raises new safety questions as automakers are poised to dramatically increase production.
GM is asking owners of 2017 Chevrolet Bolt EVs to take the vehicles to dealerships for a software update that will sooner detect a potential battery issue that could lead to a reduction or loss of acceleration.