Photo Gallery: 100 Years of Chevy 27/45

Los Angeles Mayor Antonio Villaraigosa is behind the wheel with Joel Ewanick, General Motors Co. vice president for U.S. Marketing, in the Chevy Volt, 2011 Green Car of the Year, presented by Green Car Journal, at the L.A. Auto Show Thursday, Nov. 18, 2010.   (AP Photo/Reed Saxon)