That service number looks like a 15-16 ECU. That will not work with a 3 wire fuel rail pressure sensor.Serv # 12672537
Will I need to have the ECM and tcm from 8l90 matches up or just have the ECM setup for what I am running?
Its always best to get the TCM that was mated to the transmission. The 8 speed is a pain in the butt because the TCM has to be programed with the solenoid pack info.