I was thinking this would be logical, but I did go out toa dealer today to specicially check the 2nd row bench. Granted it was an Outlook, but I am pretty sure that is the same. The rails do have different placement for the 2nd row bench. For the 60% bench, one rail is similar placement to the captain on the left side, but the other rail is under the middle section, clearly to the right of where the captain's chairs would be.admin said:In fact, according to my dealer (so take this with a grain of salt), both the captains chairs and the bench share the exact same rail mounts. This means, in theory, the seats are interchangeable. The dealer we were working with had the exact Acadia we wanted on the lot expect for the middle row seats (it had bench, we needed capts). He first said they could swap them out for us, but when he checked, the only other 2 Acadias they had were different interior colors, so no go. Still, it's an interesting possibility that may someday help someone get exactly what they need without having to order.