Sure but is that going to enhance any performance of the suspension. Absolutely not. Realistically these leveling kits are 1990's body lifts, I don't want a lift just to run bigger tires and look cool. I want suspension travel and a smoother ride.You could always add in a little larger rear block.
bz-agg is running a 285/65r20My dealer has said that leveling will not affect the Poweboost in any way and will also not alter or void the warranty (assuming the dealer was inferring "if we do it").
So, they are running a 295/60-20 and @bz-agg is running a 285/60-20 tire. Looking at photos of both, I think either way you good.
295/60-20 = 33.9" x 11.6"
285/60-20 = 33.5 x 11.2"