My 2002 Silverado 2500 HD with Duramax engine suddenly stopped running. Although the tank read 1/4 full I added 5 gallons to be sure of fuel, then I attempted to prime the fuel at the filter. It seems to pump air mixed with fuel and ,when I tighten the bleed screw, the pump will pump endlessly without building up pressure. Any Ideas???

SOURCE: Chevrolet 2500 Not Running, May Be Fuel Filter Sensor

if it dont have good compression it will not start check the comp and make sure there no water in oil if fuel pressure is low it will not pop the injector open try some starting fluid

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fuel pump is obviouslynot working !
check it & its wiring!!!!!

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mo me it sounds like low fuel volume i would check my lift pump

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Sounds like the sending unit in the main tank is faulty.

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Before we do anything else lets do a fuel pressure check to make sure the pump is a-ok as well as the fuel pressure regulator. Your gonna need shop manual for this as well as a fuel pressure tester. If all checks out then move to the Turbo code.
Turbo code looks like the waste gate is stuck open and your not building the boost. Do a visual inspection look for any signs of overheating and bearing wear. Check or change oil as needed.
With regards to the Mass air flow I believe you have to replace it. Keep in mind this thing might be the root of you whole problem.
I strongly suggest you use the shop manual for the codes you got. it will make this repair a snap.