2003 trailblazer system too lean p0171

2003 trailblazer running good for about 10 minutes , would hesitate and gas pedal goes dead not accelerate with pcode 0171 system too lean, once on the road feeling like fuel pump has no power .but starts and drive. .it would be doing this randomly that's the reason I kept recording to see what fuel pump had to say

[@nigeldsouza9345]

hey man, did it work with a fuel pump replacement? or was it the fuel pressure regulator?
i have the same issue man

[@ProjectCarTV]

Loss of consistent vacuum.

[@AntMan3DFX]

nice!