Thank you.

I have a U7198 predator and a 2001 2500HD 6.0. Does using tow/haul affect the performance tune? Or does the performance timing and such still remain the same?

I got it brand new for under $200. I'm going to fool with if for a while and then see if I need the upgrade.

I think I'll keep it. I got a really good price on it and it is brand new. I will probably use it more for the timing advance and shift management more than anything. If I feel the need to upgrade, I will.

I guess I'll just wait until the 87 octane is gone and then fill with 93 and use the performance tune.

It's 1.03. It's a brand new unit. That's why I didn't buy a used one. It must have been on the shelf for a while.

So it appears it's an older version and needs to be upgraded. WTF! It's brand new and now I have to pay to upgrade it? That's some BS.

Why does this tuner only have a performance tune and not the 87 octane tune? It's brand new and it's from Granatelli. There is no other option but the performance tune. It's for a 2001 6.0 2500HD.