Killahbyte

Hi everyone, I'm new to the forums, and looking for some sound advice on leveling and lift kits for my Denali. I've talked to 3 shops, and 4 dealers all giving me different answers and advice. One dealer told me if I put on a leveling kit I have to sign a waiver for my factory warranty. Another told me you cannot lift this truck or level it with a 2 inch kit as you will ruin the magneride and the reason you got the Denali in the first place. Since I can't seem to get a consistent answer can someone tell me is it possible to lift or level my truck while still preserving the fantastic smooth ride it has?