Oh ya I know. My 2015 Silverado 2500HD 6.0 is on 37's,lol.
Seeing how I don't want to regear the Yukon if I go higher than 35's, 33's will have to do cause of my stock gears. Even at 33 and a 4inch lift will be heavier rolling. So I'm locking out 6th gear when I can.