fiddle with the tire size until the speedo is correct.

try entering 40 for aspect ratio to start....

i just went in and modified the tire size only option and it seemed to work out well... i was thinking to myself there was no way that adding this and the CAI would give me 2.5 mpg off of one ...

Oldsaltydog wrote:Use a tape measure to get the tire height enter that in the
Change tire size. Calibration box under modify tune

seemed to have worked well! Thanks!

installed the intune a few weekends ago and have noticed that the mph if off by almost 5-7 and my mile trip by 2-3/10ths. I have 305/45/22 tires on the truck currently. How do I fix this issue?

Purchased and installed the intune for my 1500 silverado and loaded new tire calibration of 305/45/22 and now my mph is off by 5 and the mileage trip is running almost 3/10ths of a mile fast... suggestion to fix this issue?

Good Day Gents,
Wanted to know what exactly was changed with this update? Thought the calibration codes were going to get updated with this new load? From the looks of it only the next level calibration "D" was updated when these cars are now getting flashed with "G".

Thanks!

same as leeindy's response...i also have a concern of letting it downgrade and have to go back to the dealership for something else and they noticed that they most up to date calid is no more... there are thousands of other users who have done this same downgrade, and there has never, ever, been a ...

same as leeindy's response...i also have a concern of letting it downgrade and have to go back to the dealership for something else and they noticed that they most up to date calid is no more...

did you have the issues with the diablo tune?

no drivability issues, just shifting issues...which those have been resolved with the flashes they did I would wait for Diablo to update the calid. If you go back you are going to have the same shift issues as you had before the dealer flash.

well ...

leeindy wrote:sounds to me like the calid needs updated on diablos end.

hopefully one of the diablo guys will chime in after the holidays with a possible solution.. i really don't want to reflash the PCM with an older version if it will go back to its old ways :/

leeindy wrote:did you have the issues with the diablo tune?

no drivability issues, just shifting issues...which those have been resolved with the flashes they did

I had this same thing happen to me. There was no noticeable performance improvement with the dealership update, so I just went ahead and downgraded and put the Diablo tune back in my car. IMO these cars run like shit with a stock tune compared to with a Diablo tune. You won't screw anything up ...

will that screw up what the dealership just updated?

I recently went to the dealership to have a few updates done on the TCM/PCM...I had the predator 7135u installed and working perfectly prior to going to the dealership, re-installed stock tune and got the car back yesterday with the new updates done to the above components... i went to re-install ...