2006 gmc sle engine lite on. Changed intake gaskets o2sensor wires plugs sensor at the pipe going to the breather box. I forgot the name.

5

Asked by Oct 19, 2013 at 09:55 PM about the 2006 GMC Sierra 1500HD SLE1 4dr Crew Cab 4WD SB

Question type: Maintenance & Repair

Truck idles rough p0171 p0174 lean on both banks.  It is need to know what will fix it.  I
had what if to the point is collaring me to death.

1 Answer

7,365

Here's your answer - P0171 Sys too Lean (bank1), P0174 Sys too Lean (bank2). My guess would be to (as applicable) change the fuel filter externally on the frame rail, mesh filter inside the fuel tank on the pump itself and check the pressure on the fuel pump itself.

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