Minor update, I know this thread is me mostly babbling about and I'm awful at structuring my paragraphs but maybe one day someone will find it useful.
I did some width measuring today.
My current setup with the aftermarket wheels it came with is 77" maybe 78" I didn't do a good job tbh in the snow
Factory vehicle width is 74.7 according to google but lets call it 75"
These new axles and 0mm offset wheels with 11.5" wide tires will come out to exactly 77 (76.9") on paper
so it seems that it will be exactly like my current setup, which I can't say I'm too fond of. The clear coat on my rear fenders no longer exist from rocks, I can't say if thats from not running mudflaps or the wheels stick out out past the fenders, going with the later because I don't think GM would let that roll off the production line with such a huge flaw
I could run wheels that do have a 18mm offset which would bring it down to 75.7" but man those wheels are UGLY and heavy, I'm pretty picky on wheel options and I've only found one other set which look much better, I'm also not sure what kind of backspacing I need, jeep people run about 4.7" maximum on 35's but I'm not a jeep so I don't know
The polished one is what I have selected so far, not a fan of it being 9" wide or the hub bore(can be fixed) but I'm pretty picky. The black one I might consider, I don't think it looks anywhere as good and the brand name does not scream reliable to me