In this April 25, 2012 photo, Tammy Ballard works on a Chevrolet Sonic at the General Motors Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptc

 

              In this April 25, 2012 photo, Tammy Ballard works on a Chevrolet Sonic at the General Motors Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptc
In this April 25, 2012 photo, Tammy Ballard works on a Chevrolet Sonic at the General Motors Orion Assembly plant in Orion Township, Mich. Nearly four years after GM filed for bankruptcy protection, the automaker is building the Sonic, the best-selling subcompact car in the nation. It's a vehicle no one thought could be made profitably in the U.S., by a company that few people thought would last. (AP Photo/Duane Burleson)