AZGMCZ71Leveled

Hello AZGMCZ71, I just got a 2015 Sierra (Silver like yours). I don't know much about this stuff, so please bare with me. I had the dealership install a 2.5 inch level kit. I've already paid for the toyo at2's and rims, but they're back ordered, so they haven't been installed yet. My question is this...will the 295/55/20's rub at all? The dealership is trying to sell me on 275/65/20. I have no idea what this means. I assume they're quite a bit smaller. I love the l...