I have a 05 1500 Silverado 5.3 and just did a 4l80E swap. I wrapped up the install last night and fired up EFI live for the first time to find out I have the the OS 12606961. Researching the web I found out this is not a very common OS and I guess Im pretty much SOL.
I'm very new to tuning and was wondering if there was something I could manually adjust with EFIlive to make the 80e work?
I also read that the only solution might be to change the whole OS to the older OS 12592618. Can someone point me to a tutorial on this process? Were does everyone download new OS?
Thanks