2002 Chevrolet Siverado Sputter

Truck hesitates when accelerating. It seems like gas is not getting enough gas to the point where the truck will finally stall out. I have replaced the fuel filter, ran fuel injector cleaner (briefly), and tried higher grade glass. After every episode, the truck starts up like a champ, but after 3-5 minutes of running, or a lot excessive speed, it starts to sputter. Could it be the fuel pump? The fuel injector? or Sparkplugs? I would really appreciate your suggestions!

Check engine light codes: P0171 (once) and P0174 (twice) and P1133 (once)

Truck hesitates when accelerating. It seems like gas is not getting enough gas to the point where the truck will finally stall out. I have replaced the fuel filter, ran fuel injector cleaner (briefly), and tried higher grade glass. After every episode, the truck starts up like a champ, but after 3-5 minutes of running, or a lot excessive speed, it starts to sputter. Could it be the fuel pump? The fuel injector? or Sparkplugs? I would really appreciate your suggestions!

Check engine light codes: P0171 (once) and P0174 (twice) and P1133 (once)

with a pressure gage you do the fuel pressure test. you must have more than 50 psi no less. if you run on empty alot the fuel pump is most likely going.

Change your fuel filter, check your fuel pressure regulator. As j cat stated above, check that fuel pressure.