Fuel pump problem

dirt and debris are the most common reasons for failure. remove the tank and have it completely cleaned out. Roy

Are you sure the pumps are bad? If not you might try powering one up out of the truck. Some times fuel pump relays heat up and work intermittantly.

Check your wiring harnesses also. They are known for issues, and even had a TSB for harness pigtail replacement on similar models. Look for damaged connectors and corroded terminals.