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What would cause a 92 GMC Vandura 2500 to run then just shut off like it was out of gas after you have changed the fuel pump and filter?

- Fuel pressure: Ensure proper fuel pressure is reaching the fuel injector, typically around 48-55 PSI for your vehicle.

- Injectors: Ensure that the fuel injectors are clean and not clogged. Test or replace them if necessary.

- PCM (powertrain control module): Check the PCM for any fault codes or issues. It may need to be reset or reprogrammed.

- Fuel lines and hoses : Check the fuel lines and hoses for any leaks, cracks, or blockages. Make sure there is no vacuum leaks.

- Catalytic converter: A clogged or damaged catalytic converter can cause the engine to shut off. Check the backpressure of the exhaust system.

- Engine air intake system: Ensure that the air intake system is clear and not obstructed, allowing enough air to enter the engine.