FYI, My 2021 LTZ came with 20" wheels that I didn't really care for. Also I like a little more side wall for ride comfort. I wanted to go for "stock GM wheels with the correct offset and tire diameter. I like the GMC AT4 wheels and was able to pick up a near mint set at a reasonable price. I went with a 265/70-18, 32.6" dia. Continental all-season highway tread that is the closest to the 33" 20's. I changed the center caps to bow ties.