Hello,
I am working with a 2008 E38 ECM from a 2008 GMC 3500 Savana 6.0 LY6 with upgraded cam and fuel injectors. The van originally came with an automatic. I am swapping the engine and factory ECM into my 1965 C10. I am not using the automatic transmission. I am using a Tremec T56 6 speed. I have been told that going to a manual transmission with this ECM creates a problem. I am here to get it figured out.

I have been told that I may need to segment swap it. I also have been told that I may have to change the OS all together to something from a manual Camaro or Corvette.

I don't know how to do either of those things and I am just starting my learning journey.

Thank you in advance for any knowledge I will gain here!