If you look on your PA title under Body Type it will say TK which means Truck.
In PA they go by numbers instead of letters. Like Weight Class 1, 2, 3, Etc. If you don't plan on hauling much with the truck you're allowed to lower the Registered GVWR to 5,000 Lbs which is the lowest you can go and that is Weight Class 1. That's what mine is registered under and the registration fee is $58.50 a year.