Biggest Size Tires?

[el cid 13]

I have a 2000 GMC Sierra with stock rims and tires. I'm wanting to upgrade both. What are the biggest rims and tires I could get with minimal/no rubbing? I'm a big noobie at this kind of stuff so sorry if I didn't provide enough information. I would be glad to provide more if I need to. Thanks everyone

[yukon25008.1]

go with any size wheel you want..?x8.5 or 9 wide

if your staying stock suspension height i would stick with like 32" tall 10 or 11 wide max with no lift