ANSWERS: 2
  • i got a 2002 yukon xl my fuel pump went out and i could still hear it come on,it has plastic gears in the pump,these gears strip out. i think thats your problem.
  • The injectors in these motor require 50-55 psi to push the popplet valve open at the end of the injector. You need to check the fuel pressure to see what it is. Pump might be working but not enough pressure.

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