When my fuel pump was going out I went up to AutoZone and borrowed a fuel pressure tester. It's a pretty simple procedure to test it, might require a strong stomach however as there will be gas fumes as you tighten it on the schrader valve.
My fuel pump was indeed bad, it's a pretty easy fix though. Remove the bed, pull the old pump out, put new pump in, replace the bed. Takes like 10 minutes, the pump was about $150 I believe and came with a nice warranty. You can probably find it cheaper online. The guys at AutoZone gave me a hand with lifting the bed on and off so it was a good deal in the end.
The fuel pump failing is pretty common with these pickups. They're exposed to the elements because they're placed between the bed and cab, allowing weather to deteriorate the critical components that connect the pump to the vehicle.
Keep in mind that running any vehicle with less than 1/4 tank of fuel consistently (think Great Recession + gas prices a few years ago) will slowly damage the fuel pump over time. Also, I believe the ethanol in most of the gasoline you'll find is not good for the pump either.