Hmm okay so that's something I have to have a guy look at and explain for me because I don't get it *so embarrassed* Tailgate bump stop? I can see the diagram & #4 but my eyes are super bad even with reading glasses & expanding the image I'm not understanding what I'm missing on the truck. Will have one of the guys here look at that and tell me if I need it or not... Thank you for sharing that!! Will let you know :-)