I have the Otter large and the same pickup you have. The sled comes right up to the edge of the back. The tailgate closes. and it is going to be close if you attach any tow hitch. You have your choices listed in other posts, so if you want to be safe and have more room, I would go with the medium and use whatever hitch you choose. The foldover style looks to be a good one, but takes up alot of room. The one that detaches would be less room.