ReutersUS auto sales demand begins to thaw in MarchReutersDETROIT (Reuters) - U.S. consumer demand for new vehicles began to thaw in March, especially for luxury cars and big trucks, but not every carmaker participated in the uptick. With most manufacturers reporting by midday on Wednesday, sales were up 0.7 ...US car buyers tap the brakes in March, following torrid runSalonForm 8-K FORD MOTOR CO For: Apr 01StreetInsider.comU.S.