I have an 09 Sierra, 5.3 4 speed, I love my inTune! I have it set on 87 octane, DOD off, firm shifts and tire size recal (the tire size recal is off by a bit, but no biggie). I have increased my throttle response, and my fuel mileage has gone up by an average of 3 mpg!

Truck has a K&N intake, MBRP ...

I would also like to say that my inTune has been flawless. I have had my 87 octane/DoD delete/Firm shifts installed for over a week now, and it is awesome!

Once again Lew, thanks so much! That helps a lot!

I'll be one of the people to say (again) I love my Intune, and I have had no issues with it. I am no tech guy by any means, so I asked questions before doing anything I wasn't sure about. Thanks to the experience of the moderators on here, I have ...

Hi there, new to the Diablosport Forum.

I bought my inTune this week, and I have installed exactly what I wanted: 87 octane/DOD delete/Firm shift/Tire size calibration. Aside from using Windows 8, I have not had ANY issues with my tuner or the process. It has been fantastic and has "woken up" my ...