Not the installer, builder, not an expereinced HPTuner user....
See attached: ReadECM_E76_T42_FSCM_CTSV.HL.Mar132021.jpg
LH9 5.3 that has been swapped with a LSX B15, then Fuel Pump --> Deatschwerks 300c to ensure enough fuel available.....
Trying to understand the need for this FSCM Hardware?
How to remove this FSCM hardware from the ECM, given not actually installed in vehicle.