I have the same truck (even in the same color) and I have the hitch you listed. As explained in a previous post I had to raise my 5th whl to get the bed rail clearance that I wanted, I have towed into a boonedocking spot with no clearance problems and did a 1,400 mile round trip and it tows great. I had considered going with 1.5 inch lowering shackles before I raised it, I still wouldn't rule that out as in my estimation these trucks are too high as is. Once I hooked up my truck sits pretty level and I have between 5 and 6 inches bed clearance. Wished I had taken pictures when hooked up so that I could share them.What 5th wheel hitch are you using?
We recently ordered a 5th wheel toy hauler to tow with our 2020 AT4 HD. I have the 6'9" bed.
The hitch I'm decided on is the B&W RVK3710, which is for the 2020+ puck systems. Now you have me concerned about height of the hitch and 5er to rail clearance.
I was looking at the Andersen Ultimate Hitch but have decided against it. My understanding for it though is that Andersen has released a new version that is slightly taller to accommodate the higher bedsides.