2007.5 Silverado 2500 6.6l lmm reduced power mode

Hi, anyone have a datalo of a stock fine running 07+ duramax and layout.
This truck doesn't show any code, and hapenned after a engine swap for repair

Thanks

From the stock side of the LMM, usually reduced power comes from EGR , Tubo and low fuel delivery data. It sounds like the concern was introduced by the swap some how. Revisit connectors and basic fuel pressure and vacc readings as neccessary.