That did it! Changed ‘afm/dod’ To ‘on’ and it worked. Thanks everyone!

I will try updating again. I was having an issue earlier with the i2 always saying there was an update available through Ignition. No matter how many times I updated it, there was always another update. Once I try again this evening, I will post back here my result.

Thank you MonteSS

I have a 2017 GMC Yukon with the 5.3 and I have successfully installed a tune to it, however, the only thing I want to modify is the active fuel management. When I choose the afm to be off, it still works no matter how many times I tune it. All I want is stock ecu tune with AFM disabled. Is there an ...