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Thread: 12216125 OS Auto to Manual trans segment swap

  1. #1

    Default 12216125 OS Auto to Manual trans segment swap

    Hi,

    Have 12216125 OS from a Tahoe Auto Flex Fuel but need Manual trans Segment swap.

    anyone have a 12216125 OS manual file available.

    Thanks

  2. #2
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    This is a weird OS that had limited use, Im not aware of any manual trans that used this OS. I know the Tahoe/Yukon/Avalanche used it with both 60E and 80E, but none of those vehicles were made with a manual.

    Is this in a Tahoe or a swap? Do you need FlexFuel support on a 512kb PCM or could you switch to an 03-05 PCM? Downside is you'll need to match the pedal/TAC/OS year so you might have to buy some new parts. If in a stock vehicle, you might have to switch to whatever OS that works with a compatible manual trans (I know 2000-2002 4.8 Silverados had a Manual option).
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  3. #3

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    Using 12216125 for the flex fuel on a 411 conversion.
    As have all the bits really didn't want to have to buy another ECU and license.
    May give it a go with all the auto setting changed to Manual and DTC turned off and see what happens.
    A segment swap would make it easy-er.

  4. #4
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    Depending on what you need to work, you might have to change the trans type to manual. I have found this in other 411 OS's and could probably help you find it for the 12216125 OS. This would be a CAX file type change.

  5. #5
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    If turbo_bu can help you out, it'd be worth it. Basically know it will run in P/N the whole time so you'll have to be mindful of that as well.
    ~Erik~
    2013 Sonic RS Manual - 1.4L I4T E78, starting the mods
    2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc.
    2002 Chevy TrailBlazer LT 4X4 Summit White - 4.2L I6 P10, lifted, wheels, etc.

  6. #6
    New Member
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    Apr 2017
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    Hey Apples, did you ever get this to work? I was trying to do the same on my car. Eventually just abandoned it and switched to straight E85 tune, but I would really like to get the flex fuel features working.

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