That is correct. I will choose to believe the dealer, who is family and would gladly do whatever I asked him to do if we could get away with it, and GM over some dude on the internet. Just because some people believe something doesn't make it so. Go talk to your dealer......I wouldn't take me (some dude on the internet) as a final authority either. But I am sharing what the dealer I use says. Now your dealer may do whatever you want, like mine, but if he hooks your vehicle up to the computer and it records the emissions have been tampered with, your dealer isn't going to be paid for your warranty work. FWIW