TABLE- Top-20 selling vehicles in U.S. in March

April 1 (Reuters) - The following are the 20 top-selling vehicles in the U.S. in March as reported by the automakers and ranked by total units. Top 20 selling vehicles in U.S. in March RANK VEHICLE Mar-15 Mar-14 PCT CHNG 1 Ford F-Series P/U 67,706 70,940 -4.6 2 Chevy Silverado-C/K P/U 45,193 42,247 +7.0 3 Ram P/U 41,595 42,532 -2.2 4 Toyota Cam