Well my cousin wants me to tune his 01 2500HD 6.0 I told him I don't really know much about tuning a gasser, I don't even really know what I'm doing with my diesel yet!! LOL It's just really easy to make the power with them. I told him maybe an SS tune would wake it up. My ex also wanted me to do the same thing for her (same truck, 1 year newer) I think she wants a mileage tune though. And I got a buddy with an 03 that wants some more power too.