good to hear

had a vx muffler installed today, we just cut the old one out and put this in place. do I need to redo the tune or will I be ok with the tune that's in it?

yes I have noticed that it has hurt my mileage since installing it.

I have a vortice throttle body spacer on the truck will have that on with the intune mpg tune affect me any?
also running 33" tires.

I had a 2000 4x4 3.0 and my way honestly was to sell it and get a full size. true story went up to 03 ram 1500 hemi and got 18average from the 12 in the ranger

I am doing the upgrade to in-tune. will I need to do the recal to the car still?

what do I have to have the dealer do? or can I do this with the tech2 or gm online laptop that I have access to at school?

so I should call in and talk to someone or how can we figure it out?

got the predator from my brother he had it on his truck and traded it in lease was up . he put it back to stock. it ays calibration not supported on the screen. I updated it to v.9r31 and still wont work. what do I have to do? I just want better mileage and adjust my tire size
I have a 09 Silverado ...

is this still available?