In this Wednesday, Sept. 18, 2013 photo Chevrolet passenger cars form a row on a dealer's lot in Needham, Mass. U.S. auto sales for September are released on Tuesday, Oct. 1, 2013. (AP Photo/Steven

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In this Wednesday, Sept. 18, 2013 photo Chevrolet passenger cars form a row on a dealer's lot in Needham, Mass. U.S. auto sales for September are released on Tuesday, Oct. 1, 2013. (AP Photo/Steven Senne_ less