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Thread: os 1252065 4l80 swap help

  1. #1
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    os 1252065 4l80 swap help

    2006 gmc 1500 4.8l os 1252065 swapped in a 4l80e with the np 261 transfer case need helping finding an 4l80 for segment swap with the same os

  2. #2
    Tuning Addict 5FDP's Avatar
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    That OS isn't the stock OS anymore. You can only use the segment swap with a stock OS.

    So the upgraded OS that is on that file won't work. You can flash back to stock, do the segment swap, apply the upgraded OS to the new segment swapped file, then copy over all your tune information into that new file.
    2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.

    If you don't post your tune and logs when you have questions you aren't helping yourself.

  3. #3
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    Excuse my ignorance...just now getting into tuning, under "tune details" in the controller's tab it says "operating system 12606807", but under the OS tab, it says "Speed Density-2 bar OS: 1252065" just need help finding a stock 4l80e tune with the correct OS # to do the segment swap. I can't seem to find one in these forums.

  4. #4
    Tuning Addict blindsquirrel's Avatar
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    The stuff in the OS tab are things that can be applied, not what's applied already. The Tune Details window is what it actually is. POST YOUR FILE and it doesn't take three weeks to solve things like this.

  5. #5

  6. #6
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    Thank you for that file will try it in the morning