So about a week ago I bought a ‘15.5 Denali with 140K miles on it. From the pictures it looked like a stock truck suspension-wise except it has air bags on the rear leafs. Then I get the truck delivered to me and it’s on 35x12.50s on the factory 5 spoke 20” wheels. Done my share of digging around and figured out that’s not possible on stock suspension, but the truck isn’t level so I didn’t think anything had been done to it. Crawled under and it looks like it has stock keys with about an inch of space above them so I don’t think they’re cranked on, stock UCAs and doesn’t look like it’s up any higher in the front from what I can tell. Posting the pictures to see if anyone has any idea what’s done to it. I want to level it out because I hate the raked look but don’t want to go order a bunch of shit to find out something is already done I just don’t know about. Thanks for any help y’all have.