What is the name of your state?Florida I have a F-350 dully pick-up and a 14 ft. horse trailer.A state trooper in Tennessee gave me a ticket for having a commerical vehicle registered as private passenger vehicle.Which it is and has been since 1997.He says that I was pulling a semi-trailer with my truck GVWR 20,400 lbs.My truck weighs 6400 lbs and trailer weighs 4200lbs. Can't understand !!!!!!!!! My truck wouldn't even move if I had that much weight involved.Horse trailer is even a featherlight trailer at that. State Florida agrees that it is a private passenger vehicle.