yeah the stock is 17 but i was curious as to if that was just a gm preferance or actually the smallest they could go. right now i have 275 60 20 pro comp extreme mud terrains with out any lift i just cranked the torsion bars to get that extra little bit to get rid of the rubbing on the mudflap
35s will not fit. They barely rub with just the weight of the vehicle on them. Not to mention drving you would destroy the finder. Personnally I dont like the look of alot of tire in the fender. I love the stock 31s, Body lift 33s, or 6" suspension 35s look.