Swapped a 6.2 and 8 speed from a 15 escalade into a 2011 suburban. Have pretty much everything figured out except the fuel pump won't turn on. I can turn it on with a scanner though. It's running the stock suburban FPCM. I have no codes other than a P018C and U18AC for fuel pressure sensor and communication with FPCM which I turned off. Does anyone know if there is a way to make it work or if I would need a newer FPCM or just have to ditch it all together? Or if there is something I can change in the tune to make it work? The only real differences I see in the wiring is the inline pressure sensor for the 11 goes to the FPCM whereas on the 15 it is wired to the PCM. If anyone has some input I would greatly appreciate it.