That's one of the reasons that I just bought the correct size fixed hitch, take a measurement and buy one fixed hitch and your trailer is setup.
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If you don't want fixed, then I would get this one, its not $400, nearly half that, and very versatile. (up to 8" drop, 2.5" tube)
If your truck has the pro tailgate, then be careful, you can fold it right into your hitch ball You can shut that feature off just by holding the button or something like that.
I always remove my ball mount when I am not using it, or it will just rust trap moisture in the receiver and bash peoples shins.
I know your truck doesn't care most of the time because its a new HD diesel, but its still safer to have it setup correctly, for when someone pulls out in front of you or something and you need that little better stopping distance or something like that.