Tiny Chevrolet Sonic helps Detroit shake off rust

The Associated PressAUTO COMEBACK: In this April 2012 photo, Tammy Ballard works on a Chevrolet Sonic at the General Motors Orion Assembly plant in Orion Township, Mich.

The Associated PressASSEMBLY LINE: In this April 2012 photo, Chevrolet Sonics move down the line 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...