1993 C3500 extracab, dually, promo Aug 19, 2015 12:50:27 GMT -7 rails31 likes this Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Robert on Aug 19, 2015 12:50:27 GMT -7 This is another one of the promos I picked up for future projects. This one will probably get detailed out and a 5th wheel hitch added to the bed.I did a little more detailing on this one. It sure makes a difference! I added a gooseneck trailer ball in the bed since this is a dually.