Recent content by Gildan

  1. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    Oh, the vin number on the door sticker clearly states 2008 and the manufacture month as 10/08. There is absolutely no chance that they could have gotten it wrong except for negligence on their part or their computer system has the wrong information. Either way it is clear negligence and/or...
  2. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I went directly to the OEM manufacturer site and looked up what vehicles the pumps the dealership was giving me went to - they were the pump designed for a 2007 and earlier Yukon which is not compatible with the 2008 and later. The 2008 and later Yukon with the 6.2 motor use a different pump...
  3. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    OH! I just figured out what is wrong here! I looked up the part number for the pump to see which vehicles use this particular pump. They have been giving me the pump for a 2007 and earlier Yukon. The 2008 Yukon use different pump and the ones for the 2007 are not compatible.
  4. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    Nope. It's not a flex fuel and I didn't put E85 in it. The vehicle is just a piece of junk from the get go.
  5. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    All that has been checked and there is nothing wrong with evap system. P0191 abd P069E are the only codes being thrown simultaneously after simultaneous provisional codes for the same thing are thrown. Those are the only codes. Then performance deteriorates and the only thing that can be done to...
  6. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

  7. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    Nope. Everything is as it should be. It started when I replaced a fuel pump that was leaking out the top and pouring gasoline all over the ground. All I did was switch out the original OEM pump for a brand new OEM pump. Nothing changed except the pump which turned out to be bad right out of the...
  8. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    No, this Yuke uses a returnless system. The evap system has absolutely no faults. In fact, everything is within specs except the fuel pump pressure (and I keep getting defective OEM pumps right out of the box one after the other). I ordered yet another fuel pump that is claimed to have been...
  9. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I replaced the sensor a couple of hours ago to see if that was the problem and it was not. In fact, it made it worse. I put the old sensor back in and it got even more worse. All the live data confirms the sensor is working correctly, the ECM, BCM, FPCM, etc., etc., etc., have literally been...
  10. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I switched out three (3) new pumps today and each one was in varying states of non-functionality. Can you imagine dropping the same fuel tank and replacing the pump three (s) times in one day and replacing all the modules that appear to be fine with brand new ones and get the same exact results...
  11. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    The only problem with that is that the required volume of the fuel being delivered at that pressure is controlled by the FPCM driving the speed of the fuel pump and it will cause a lot of other issues that won't be able to fixed.
  12. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I tried that. The fuel pressure key on is 40 - 48 psi and fluctuates with every key turn. One time it will be 30, the next will be 48, then all random pressures with each key on test. The live data coincides with mechanical gauges exactly. Pressure drops even lower when the motor is running. The...
  13. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I've had it with this 2008 Yukon There's no fixing it at all. I'm stripping out all the new parts I put into this issue, returning them all for my money back and sending off the crusher at this point. I have gone through a total of 7 defective out of the box GM OEM fuel pumps from the...
  14. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    It started after I replaced the rusted out pump. It turns out that it isn't the pump. It was an ECM error (I'll explain at the bottom of the post). P0191 code. Mechanical data identical to the live data. And the pump was not up to specs, but it wasn't the pump. (see bottom for...
  15. G

    2008 Yukon Denali - $3000 dollars in repairs and I still have P0171 and P069E DTCs.

    I figured out what is happening - Detailed description at the bottom of the post. I discovered the issue upon watching the live date (see end of this post). It's a P0171 that is up and triggering the ECM to query the FPCM - it's the brand new pump - defective. I did another diagnosis today...
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