I have a 2002 gmc sierra with a 5.3.p0101, p0171, p0300, p0430, p0756. What do you think?

Question

I have a 2002 gmc sierra with a 5.3. im getting several codes. p0101, p0171, p0300, p0430, p0756. What do you think? Running very rough, barely idles, no power.

Answer 1

P0101 MAF (mass air flow) circuit / range performance problem

P0171 Fuel trim lean Bank 1

P0300 Random misfire

P0430 Catalytst system effieiency below threshold Bank 2

P0756 Shift solenoid "B" performance 1-2 shift solenoid valve performance

This is a misfire ,With a fuel trim lean on Bank 1, and there is no code set for bank 2. Seems like a fuel injector misfuel . or the the fuel pressure regulator leaking fuel into the intake attached to the fuel pressure regulator is a vacuum hose if the fuel regulator is leaking fuel enter into the intake and can cause the misfuel.