DETROIT, MI - SEPTEMBER 06: A 2014 Ford Focus sits for sale at Bill Brown Ford Dealership on September 6, 2013 in Livonia, Michigan. U.S. auto giants had a good summer: In August Ford had its best month of retail sales since 2006; General Motors had its best month since 2008. Andrew Burton/Getty Images/AFP== FOR NEWSPAPERS, INTERNET, TELCOS &amp; TELEVISION USE ONLY ==