It looks to me that you can figure this by yourself (with an assistant to help)
Go to Home Depot etc. and purchase a 1x2 eight foot long. Cut a small “V” in one end, take that along with a 2 foot carpenter square, level (optional) and something to mark with. Go to the 5W that you are looking at. Place the 1x2 “V” on the hitch pin, hold the 1x2 horizontal, align the 1x2 and the carpenters square at the extreme corner of the 5W and mark the 1x2 for length and cut off the excess. This is the approximate extreme length of the corner of the 5W.
Now, if you already have a 5W hitch installed in your truck the next is a little easer, if not, the 5W hitch pivot point in your trunk bed is directly above the center line of the rear axle or a inch or two fwd. and half way from side to side. If you can swing the 1x2 behind the cab without hitting the cab OK. I think that you would need 4 inches clearance MINIMUM or 6 inches is better. Remember not all campgrounds are smooth and pulling across gutters and into some fuel stations can be rough.
The final thing is to make sure on the paper work that the 5W you desire will clear the cab or the dealer will have to provide a AUTOMATIC sliding hitch!
Anybody have another suggestion for a different way to ESTIMATE if you can make a sharp turn pulling THIS 5W?
2017 GMC 3500 4x4 Denali Duramax
2019 Outdoor RV (ORV) Timber Ridge 24RKS