File photo of the grill of a Ford F-Series pickup truck at Koons Ford in Silver Spring

 
File photo of the grill of a Ford F-Series pickup truck at Koons Ford in Silver Spring
The grill of a Ford F-Series pickup truck is seen at Koons Ford in Silver Spring, Maryland in this April 3, 2012, file photo. Ford Motor Co added to the strong earnings season, but market gains were limited after U.S. economic growth cooled more than forecast in the first quarter, April 27, 2012. REUTERS/Gary Cameron/Files (UNITED STATES - Tags: TRANSPORT BUSINESS)