What will cause a the van stop running after 15 then stop and restart in 2 hours on 2002 Chevrolet Express 2500

The ingition module and coil has been replaced. The cycle is repeats, vehicle runs for 15 min then shut down. Need help and suggestions.

1 answer
possible fuel pump binding up after running. i rec you install a fuel gauge and drive the ven and see if you loose fuel pressure. hope this helps