2013 Cadillac CTS-V 6.2 Ltr How to turn the fuel pump off

I want to clean my fuel injectors with a cleaning system that provides its own pressure. I need to turn the fuel pump off. I have tried using VCM scanner and commanding the PW to zero with no luck. I have tried using VCM editor and changing the fuel pump PW to zero at idle. The trims go rich but the pump remains on. I don't see an option anywhere to turn the pump off all together. The car does have a FPCM, I have even tried the Tech2 to command the pump off with no luck??


HELP!!

Did you not get the optional software-controlled fuse puller?? :confused: