Hello

I have a 2017 L96 swap running E38 from 2013 Silverado right now. The Transmission is a 2018 Silverado 6L90 with T43 OS 24276638. The engine and trans are from different vehicles. Does anyone know of a compatible TCM OS that I can program the current TCM? Also I have a new E38 and can program it with a engine OS that will work with the TCM. Right now I have the engine running but loss of communication TCM.

Any help is appreciated.

Thanks