By Tobias Carroll Some automakers make announcements by touting the performance specs of a planned new model or an electric version of an existing car or truck. Sometimes, though, that isn’t really necessary. Take for instance Chevrolet, which just made a terse but significant announcement on social media about the electrification of one of its signature vehicles: the Corvette. “An electrified #Corvette will be available as early as next year and a fully electric version to follow,” the company said on Twitter. Accompanying the announcement was video of a hybrid Corvette gliding across a froze…