Scott, like you said you'll be fine. Here's my '96 Tahoe 4wd. I even push a SnowSport plow with it.
I did need to figure out some custom soft bump stops and add air helpers in the back for the boat. You won't need that with the factory leveling system intact.
BTW that's a nice Denali and post up new pics with the wheels on it when you get them!