Without seeing what you have its hard to render an opinion. If the truck is still under warranty call the dealer and see what they say. Its unusual for the new vehicles to leak oil. If you want to check for the leak yourself, they make a dye that is specifically designed to add to the oil to help locate oil leaks. A auto parts store usuallly has it and the dye may come in a kit with a special flash light. Wipe everything down, add the dye and check it every couple of days.