General Motors Files For Public Offering Listen Download Embed Share Share this on Facebook (Opens in a new window) Share this on Twitter (Opens in a new window) Share this via Email In this handout image provided by General Motors, The first pre-production Chevrolet Volt is on the assembly line at the Detroit-Hamtramck manufacturing plant March 31, 2010 in Detroit, Michigan. ( John F. Martin/General Motors (via Getty Images) ) Produced by Blakeney Schick Produced by PRI and WNYC