[N0DIH]

That looks like a near twin to my 99 Suburban fuel sender/pump assy.

Note that GM has lots of issues with insufficient wiring/connectors and inspect carefully. IF there is melting present, REPLACE the wiring. Many parts stores have replacement connectors, some pumps even come with it. I would be willing to bet more pumps are NOT bad and the wiring is, but the pump likely could be still good. Or might have reduced life due to the lower operating voltages, so it ran in an inefficient manner for too long.