It might still have the options list on the drivers side inner front fender,or on the glove box...if its gone,you may find a "build sheet" somewhere in the truck--often they stuffed it in the seat springs...it may be possible to bring the VIN # to a dealer and have a reprint of the original "build" printed out,but they wont do it free most likely...I think there is a place online that can do it for a fee too?..