diagnostic

  1. I

    OBDII reading speed wonky

    I have a 1996 c1500 4.3l vortec 4l60e. Me and shop have been working on an 6.0 ls swap and matching 4l60e. We had a custom engine harness made for this project and we are using a terminator X. The big problem we are having is that when the tuner connects to the OBDII, and drives the truck, the...
  2. Fobra

    front differential not engaging

    So I bought my 96 GMC Yukon 5.7 4dr with the electronic 4x4 (switch on dash) a couple months back. The previous owner made it clear that the 4x4 doesn't work, after all it was a project truck at the time he sold it to me. I'm just now getting around into working on the 4x4 and the previous owner...
    • Fobra
    • Thread
    • 4x4 4x4 issues 4x4 not engaging diagnose diagnostic fromt differential front axle help offroad transfer case
    • Replies: 8
    • Forum: Transfer Cases
  3. Fobra

    No power to passenger front window switch

    Trying to chase this issue for the passenger front and driver rear windows on my 96 Yukon SLE 4Door. None of them are getting signal power. The power locks work. When I try to use the master switch, it sends out voltage to the signal wires but they still don’t go up or down. I’ve tried checking...
    • Fobra
    • Thread
    • diagnostic electrical electrical issues power window switch power windows wiring help wiring issues
    • Replies: 3
    • Forum: Electronics
  4. Fobra

    Power windows circuit 343 no power

    96 Yukon sle 4dr. So I’ve been trying to chase this issue with the power windows and I keep going the wrong direction. When I first bought the truck, none of the power windows worked. I tested all the window motors by manually feeding power to them and they all worked flawlessly. Changed all the...
    • Fobra
    • Thread
    • diagnostic electronics help power windows wiring diagram wiring help
    • Replies: 0
    • Forum: Electronics
  5. A

    No 4HI

    Hello, I have been troubleshooting my 4wd for a while now. Hopefully somebody can help. I have a 1996 K2500 with push button 4wd (RPO NP1) and 4L80E - no auto just 2Hi, 4Hi, and 4Lo. The 1996 is a weird year since the TCCM housing doesn't seem to match the 97+ models. It does seem to match the...
  6. T

    GM Diagnostic Flowcharts

    My truck is throwing a code 32 and a 43. Does anyone have a copy of those flowcharts that show the diagnostics process for these? Its a 89 350. I used to have a PDF of the whole book but i can't seem to locate it. Any help is appreciated.

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