Recent content by Zmoney

  1. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Well my fuel light used to come on with about 2 gallons left in the tank. Now it comes on when there's six. Shrugs
  2. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Thats very sensible. Ill out it at the top of my to do list. Im wondering if there are signals sent to the stepper to reverse actuation as well. Im sure there is something built in to the calculation to compensate for liquid movement in the tank, otherwise your fuel level readout would...
  3. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Any idea if the text display backlight can be changed? I usually have to tap on mine duting the day to get it to go bright, so I know something is loose in there. Also, if you have a link to the leds, yep I'd do it. My lower dash components have been hanging out in my back seat for months now...
  4. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Ok but Im doing something wrong then because I made the change to the custom PID and dont get any data.
  5. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Then I'll take that as marching orders. Thank you :)
  6. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    I am the second owner. Original Sending Unit was swapped out by my mechanic for a Delphi pump from a donor vehicle. The first 'version' of this issue manifested when I thought that I had a bad unit at that time because my cluster at full would simply display between 3/4 and 7/8 of a tank as...
  7. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    You're right. It is useful information. Again, mine is receiving a signal that says full but immediately starts to drop down without any hang time above the F mark. Im reading E at around 1/5 tank left or better. It has to be a corrosion issue or something leading to extra resistance between...
  8. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Fair enough. The reason I first got into this crusade was that it didnt used to come on so early. Either that's true or I'm nuts. I'll figure out which eventually, I hope.
  9. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    I'm assuming from the harness connecting into the sending unit itself?
  10. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Tracking. I'll give this a shot. update: I doublechecked the form and Im certain I filled it out exactly as you have. Made the change to the mode and pid field and saved it. Readded it to my live data page and it just reads 0.0
  11. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Low fuel light comes on at the moment the needle hits empty (on both clusters)
  12. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    Forgive me, but I need a little more hand holding than that. Im very tech inclined but never before used a scantool app.
  13. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    I haven't swapped the pcm. But this is now the 3rd delphi sending unit (latter two were both brand new factory sealed) that is presenting the same issue. (Scan tool says lots of fuel left, so do my pump receipts) dash cluster (two different assemblies tried) is way off. My money is on some kind...
  14. Z

    NEED HELP 05 Trailblazer Fuel Gauge Problem. Bad PCM?

    I'm baaa-ack! Ok guys here's my status update and plea for more gracious assistance: After the absolutely correct Delphi sending unit went in, I've still got the issue. Rough idle was fixed by another TB cleaning, hard 1-2 shift was fixed by new motor mounts. I got an obd Bluetooth reader...

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