2000 K2500 4x4 7.4 L a/t After further review, I believe my fuel pump died. What is the best option to use to replace it? I dont hear it run when key is turned on and no pressure. What are the chances of a bad relay? How can the relay be tested? Also, if I replace the pump, should I remove the bed? It is a extended cab with a long bed. And what is the pigtail I keep hearing about to replace? I am looking at the Bosch pump from Advance. Any comments?