Crappy old cell pic of the wife's Yukon. 2-3" lift keys with 1" coil spacers on the rear. Tires are LT285/70R17/D AT's, zero rub with zero trimming.

 

You should clear a 33x10.5 (285/70r17 or 285/75r16) with no problem may need crank torsion bars slightly if you want wider need different offset wheels....seen many of these trucks running them with no rub at all

 

Use an OEM wheel. The width and more importantly the perfect offset is where you get the fit.
I had 33/12.5/17 interco Truxxus tires on mine with no leveling kit. Only about an 1.5" crank in the front and some minor trimming.
Through the years I've nearly begged people who are hell bent on wasting money on keys/leveling kits/whatever, not to waste the money before the try without.
I'm deployed so I'll have to search for a pic but it looked great and worked and cost no more than a little time with a tape and a wrench.

 

Found a few...

 

Have seen oe wheels with 33s rub sway bar slightly on turns... Goin with slighly less offset helps in that case... Wholeheartedly agree with leveling keys/kits, just need be careful with the torsion adjusters have seen bolts break without relelasing some of the tension...