hello,
1st time posting on this forum i have a question about the largest rim/tire size i can go on a stock z71? i am sure this question has been asked a million times every tire shop i go to has a different answer.
thanx for reading my post and hope i can help out.  

what year? what size rim? is it lifted or stock? no matter what don't go ant bigger than a 35" tire on that truck. that's about the max your ifs can handle without breakin stuff or at least eatin it up quick. i have 315/70-17's(34.8"x12.5") on my '06 with stock rims and they fit fine before i lifted it at all, just cranked the torsion bars and realigned it. it is better to use a good leveling kit though. which i did eventually.  

all stock, rims, tires, no lift just want a better tire for light offroading. my buddy has a 05 with 35's but i'm sure that is to big for my truck maybe 33's?  

yep, 33's will be good or even a 285/70-16 is like a step up from stock size tires and you won't be losing as much gear. (remember, the more tire you have the lower gears you need)  

again your going to be asked about max fit on stock truck as but im new at this. 1995 gmc sierra sle 2wd 1500 has 235/75r15 want to jack a little with only max tire not advanced enough yet for digging into suspension(me) insight please