Depending on how long the vehicle has sat will start and run a driven it up to morals and then stalls out. Is allowed to sit four. Of time will start right back up again run for a few seconds and stall out. Fuel pump is running vehicle will run very well when it does new fuel filter has been installed would like to know where to go now.
How long has your 2003 Chevrolet Express 3500 had this problem?
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Try renting a fuel pressure tester from a parts store to make sure you have about 60psi. You may hear the pump but it might not be producing proper pressure.
Alex
