Bob Lutz with Volt at Milford Proving Ground

Bob Lutz with Volt at Milford Proving Ground

Bob Lutz will take the Chevrolet Volt to the Late Show with David Letterman and exchange quips with Letterman and guest Stephen Colbert on Wednesday. Here he's pictured at GM's Milford, Michigan proving ground with the Volt prototype and other GM executives. | June 19, 2009 | General Motors Corporation