Would love a trans tune, is it supported yet? Have the 6.2 + 8 speed in a '15 GMC Sierra

I am having the same exact issue as described here. Hoping there is an update so I can turn v4 mode off....same truck and everything.

Mike posted a file in another thread that I had made, check it out https://www.diablosport.com/forum/viewtopic.php?p=284413#p284413

I was able to adjust tire size ...

Works perfect, thanks!

mikel wrote:load the attached update t the intune drive and let the tool import it then try again please.

This tune installs but I can't change tire size or turn off AFM or anything like that - is there another update coming soon?

I know how it works - it worked right on my last truck. It just never does that. I'll have to take some pictures to 'prove' it

I can install the Diablotune and the truck runs great - however, 'adjustable parameters' and 'tune vehicle' seem to launch the same process on the tuner.

I don't get the ability to change the tire size, AFM off/on, throttle boost...none of that stuff. It just installs the canned tune and doesn't ...

Thanks, I used that file and the tuner updated and I was able to install the Diablo Tune

However, the 'adjustable parameters' doesn't let me change tire size or throttle boost or disable AFM, or any of the things it did before. It just asks if I want to write the Diablo Tune and never gives me a ...

Yes, I emailed it to support back on June 2

I tried to tune my truck yesterday and it just says the PCM may not be recognized then copies the PCM file to the programmer and tells me to email to it to support@diablosport

Aaand now it's magically working.

Accidentally posted about it in the Predator forum

http://www.diablosport.com/forum/viewtopic.php?f=26&t=51039

A few months back I bought an Intune, opened the box, updated it, and installed a tune on my 2014 Silverado 5.3

Ran great and was very happy with it. Ended up traded the truck in, put ...

A few months back I bought an Intune, opened the box, updated it, and installed a tune on my 2014 Silverado 5.3

Ran great and was very happy with it. Ended up traded the truck in, put the stock tune back on the truck and tried using the programmer on my new truck 2015 GMC Sierra 6.2

Updated the ...