It's time for some new tires, so I'm going to go up a size from my stock 245/75 R16.
I want to go up to 265/75 R16 or 285/75 R16 and I'm thinking about Yokohama Geolander AT-S.
With new tires I also want to get a lift aswell, probably the 2.5 lift/level kit from rough country because it's cost effective; I just want a little bit extra height.
My truck ALSO has, fender flares that I installed after fixing body rust, they are slightly larger than OEM.
here is a pic.

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Now my question is.. In your opinion GMTC community:
What size of tires would you recommend for my truck?
Slight lift, flares. I do not want anything really big, It's not an off roader. I just want to fill the wheel wells up a bit more and gain some height.