P0300 issues

[Lindnernick]

I have a 2004 Chevy Silverado 2500HD With the 6.0 liter. Recently I had evap codes and replaced everything but the canister those codes went away. Then a fuel line blew which led me to replace the fuel pump, pressure sensor and part of the fuel line. While test driving I had power issues so I replaced the main battery, alternator, plugs, wires and the starter. Keep in mind this truck was at one time a plow truck so underbody rust is an issue and everything absolutely needed to be replaced. Here is the current problem, after changing the starter I fired it up and drove it for a matter of 20 minutes. I pulled in my driveway at home and turned it off. Next day it will not start. It is trying to turn over but seems like it is not getting gas. I now have a p0300 code and have checked the plugs, the coils, the mass air flow sensor and the pressure sensor on top of the engine. I am lost as to what the issue could be. Any ideas would be greatly appreciatted.

[Swimmer8366]

Relay? Fuses? Corroded fuse box? Could possibly need a new box?

 

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[Swimmer8366]

If it's corroded and rusted I would say maybe even check grounds but not with a p0300

 

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[Daryl LBZ]

*Moved to correct section*