Hey guys, im kinda confused... :shock:

workin with a bone stock 2005 Yukon 5.3 70k miles..
SES light was on so i read the codes.

P0171 "Fuel Trim System Lean Bank 1" EPA
P0174 "Fuel Trim System Lean Bank 2" EPA
P0171 "Fuel Trim System Lean Bank 1" MH
P0174 "Fuel Trim System Lean Bank 2" MH
U1500 "Inter-device Dedicated Bus" HC

B3770 "Air Flow Control 6 (A/C) Feedback Circuit" H
B0414 "Temperature Control {single or 1} (main or front) Feedback Circuit Range/Performance" H
B0229 "Recirculate Position Feedback Circuit Range/Performance" HC
B3764 "Air Flow Control 4 (blend face and floor) Feedback Circuit" H

B0429 "Temperature Control 3 (rear) Circuit Range/Performance" H
B0434 "Temperature Control 3 (rear) Feedback Circuit Range/Performance"
C0750 "Left Front Low Tire Pressure Sensor" H
C0755 "Right Front Low Tire Pressure Sensor" H


There are the codes..
So i decided to log it idling..


Lemme know what yall think or suggest something.. haha


The truck was stumbling at idle every now and again and would die on occasion.


thanks guys!! Ill be subscribed to this and be getting the notifcations on my cell phone.
So any help is appreciated greatly!!

-Jonathan

 

woops... here is the Log...

 

Does it run bad on cold mornings? It's probably the intake gaskets leaking, they had some problems with those.

 

Ill ask and see what she says.
It studders at idle some.. I need to check the fuel pressure too.