This is in my 01 Silverado. 4.8 / 4L60e. All stock. 170k on it.

This all started when I notice leaky fuel lines. The truck would start and run fine (other than not down shifting when WOT)...except when I would get down to a 1/4 tank, the truck would loose power and surge while giving it gas.
I did a quick bandaid fix by replacing the leaky sections with rubber fuel line.
Yesterday the truck did this with a full tank of gas. It would barely make it up the hill.
Starts up every time though.

Fuel pressure goes from about 50psi down to 25psi when I go wot.
It's throwing lean bank 1 and 2 codes and a stuck shift solenoid code.

Anyone have any experience with this?
Thanks

 

Fuel pump or fuel regulator is failing if your not keeping constant fuel pressure at the rail. It should maintain 58 psi at the rail.

 

Put a fuel filter on it

 

If it has the regulator on the rail (which it should) , fuel pressure will vary on the rail as you go WOT. The IFR constant in the PCM will have all the same values...

 

clogged filter, pump is going, or a damaged line causing a restriction.

 

just an update, it was the filter. easy fix. thanks

 

Your welcome

#maintenance

 

That's always the first thing to check. My fuel pump went out right about where your mileage is. Luckily I had 2/3 of a tank of gas in it when it did.... That sucked.