[whutfles]

If you can see your pinbox but not the pin, the suggestion to align the sides of the pinbox within the slider rear window works, if you have a slider. I have a RAM 3500 longbed crewcab. I have a toolbox in the front of the bed which hides the pin. The toolbox has a door on each side that lifts up. Those doors are about 10 inches apart in the center leaving a recess that I align with the pinbox. Works everytime. If you don't have a rear slider window, put a couple of pieces of dark tape in the rear window. vertically about 10 inches apart. Align the pinbox with it. It helps to double check that your dually fenders align with the side of the RV too.