fuel system Control module Diagnosis
BELOW YOU WILL FIND THE PIN OUT DIAGRAM FOR THE FSCM FOUND ON 07 AND NEWER GM VEHICLES. PLEASE REFERENCE THE DIAGRAM TO HELP PROPERLY DIAGNOSE A FAULTY FSCM. YOU CAN JUMPER PIN1 (BLACK GROUND) TO PIN16 (PINK GROUND) along with PIN32 (RD/WH BATT ) to PIN47 (GY FUEL PUMP 12+). this will hot wire the pump to run to check for a FAULTY fuel pump.
You can also check for fuel pump signal at the fscm. find the dk green /white wire in pin13. with a test light connected to that wire turn the key to the run position. if the pcm is sending the SIGNAL to command the fuel pump on then the test light will be ILLUMINATED.
Replace fuse (56) ECM 15amp
Replace fuse (21) FSCM 20amp