In this Monday, Jan. 28, 2013 file photo, cars move along an 

In this Monday, Jan. 28, 2013 file photo, cars move along an assembly line at the General Motors Fairfax plant in Kansas City, Kan. General Motors releases its fourth quarter of 2012 financial earnings, Thursday, Feb. 14, 2013. (AP Photo/Orlin Wagner, File)
Associated Press
In this Monday, Jan. 28, 2013 file photo, cars move along an assembly line at the General Motors Fairfax plant in Kansas City, Kan. General Motors releases its fourth quarter of 2012 financial earnings, Thursday, Feb. 14, 2013. (AP Photo/Orlin Wagner, File)
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