No photographic evidence...I was picking my wife up yesterday evening and saw two 2019 Rams turn right past me at an intersection. Both were towing flatbed trailers, one with a new F-150 on it, the other with what I believe was the new Sierra on it. It might just be wish fulfillment, but it looked like the Ram towing the Sierra had ramboxes; either that or it had something funky hanging over the right side of the bed in the general shape of a rambox cover,
I only saw the trucks for maybe 5 seconds total as they turned through the intersection, so I could be completely wrong.