Stacker car trailers are car trailers that allow cars to be loaded on a lower and upper deck.  These trailers include a lift in the trailer which allow cars to be raised to the upper level.  Stacker trailers come in both gooseneck and bumper pull models.  Bumper pull models generally allow for 2 cars, while the gooseneck models can hold as many as 3 cars.  Most stacker trailers come with tie down systems, finished interior and cabinets.  Millennium currently offers Pace American Shadow stacker trailers.    Stacker trailers are generally pulled with a large motor home, semi-truck, Ford F-650s or Chevy 6500.