I always seem to struggle with OS compatibility when it comes to P59 controllers. In this case I have am trying to add flex to an 06 Sierra that was a factory flex truck (virtual not a wired sensor). I have enabled flex in the tune and enabled codes P0178/P0179. The codes will not set with the sensor disconnected. To the best of my knowledge GM stopped using wired FF sensors in 2005 and I have been unable to find anything with OS 1269623 that I can use to segment swap the flex info into.
I did try flashing an 05 Flex OS 12592618 into the PCM, that did not end well (engine hot message on the cluster and bricked the PCM). I know there are ppl out there that can build out what I need in used defined parameters but I have never understood or learned how to do that. If someone can help me out I would be willing to pay for the education, or just the service.
Thanks in advance!
Oh, I attached the tune file, this is still a stock/non segment swapped OS with a 4L60, no need for 4L80 changes on this unit
TCPtuned 06 Sierra 5.3, 4L60, 2800rpm converter, large cam, headers, factory flex.hpt