Hello I need help My Tahoe stalled while I was driving. I could not hear the fuel pump humming when I turned the key to on position. I checked all fuses and relays. all seems to be ok. So I assumed it was the fuel pump. I replaced the fuel pump and still no start. still can not hear the fuel pump turning on. I tested to old pump that I replaced and it checks to be ok. So I have a new fuel pump and still wont start. I have idea where to go from here.