Just installed superchips 87 octane tune and what a difference. Truck shifts much better and has a lot more power. Can't wait to try the 91 octane tune

 

I'm, using the Superchips Flashpak in my 06 SCAB FX4.
I agree, what a difference in driving.
I have driven it with the 91 Octane tune for about a year and on average got between 14 to 15 MPG.
I just recently switched to the 87 Octane tune, and set the transmission shift points and pressures to the Superchips setting.
So far it is way better than stock.
Downloading the Flashpak updates is a snap.

 

My last trip I averaged 17mpg going 75mph and the ac on before the programmer. Maybe I can get 20mpg