[ChevyTech]

Keep in mind, on a 20 year old truck, you could have 2 or more failing parts causing problems.

The redundant fuel supply circuit may not work so the fuel pump relay is the only item supplying power to the fuel pump.

Sometimes the fuel pump current flow increases when the pump is getting bad. The high currant flow can damage the fuel pump relay, oil pressure sending unit and the terminals for the fuel pump wires on the fuel tank sending unit.

It is common for the distributor module to fail. The module could be the cause of your vehicles problem, and not knowing how the fuel pump circuit works could be leading you astray.