what is the biggest sized tire you can fit on a stock 2003 silverado with z71 suspension?

thanks!

Are you using factory wheels, if so you can get close to a 33, with a little crank and some minor trimming you can fit a 33" easy.

yeah a friend gave me 2 35s and 2 33s and i was able to crank my torsion bars to even out the front with the back and put 35s in back no problem and 33s in front no porblem, o 33s were 33x12.50 and i had them on 10in rims though but they didnt rub at all unless my wheel was turned almost all the way and i hit a huge bump then would rub a little, but u should be fine with 33s no problem, it looks sweet too! lol

o and i didnt have to trim anything or tuck anything out of the way to get it not to rub

http://www.youtube.com/watch?v=LrwTN4sU5Nk&feature=channel_page

a vid of mine on that set up i was talkin about if u wanna take a quick look