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Thread: 12620015 support for DSP-LMM

  1. #1
    Lifetime Member killerbee's Avatar
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    Default 12620015 support for DSP-LMM

    Does it exist? I get the "unsupported" message after doing the dsp5 upgrade.\
    This is a 4500-5500 truck.
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
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  2. #2
    Forum tyhee Site Admin GMPX's Avatar
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    Sorry, it doesn't exist. If I recall there was something odd about that particular OS that made it impossible to perform the DSP mods to. It is non standard compared to all other Bosch Duramax OS's.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
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  3. #3
    Lifetime Member killerbee's Avatar
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    I wonder then, what happens when you put a LD os in a MD truck (LMM).
    Michael, Systems Engineer 04.5 D-max LLY, Phoenix, Arizona Email
    Custom Tuning Services
    DURAMAX/CUMMINS ECM's TCM's for sale, all years, 20% wholesale discount available
    EFILive's first VGT "Software Wastegate Tune"

  4. #4
    Forum tyhee Site Admin GMPX's Avatar
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    I'm not sure, but 12617083 was the OS release prior to the oddball MD, that might be your best bet.
    Need official EFILive help, please go here.
    For tuning support please post your questions on this forum (or other auto forums).
    Sorry if I don't respond to your PM, don't take it personal.


  5. #5
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    Quote Originally Posted by GMPX View Post
    I'm not sure, but 12617083 was the OS release prior to the oddball MD, that might be your best bet.
    Just woundering if anyone has tried using a light truck operating system in a kodiak with os 12620015 would like to have the dsp5 but seems it might not be doable.thx

  6. #6
    Lifetime Member GMC-2002-Dmax's Avatar
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    NOPE, will not work, results in a dead key, no crank
    www.ridgerunnerdieselperformance.com

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    Tuner of many, many Duramax and Cummins Diesels.


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    Is there any other os that could be flashed over os 12620015 one this 2008 kodiak thx

  8. #8
    Lifetime Member GMC-2002-Dmax's Avatar
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    Quote Originally Posted by Tyson View Post
    Is there any other os that could be flashed over os 12620015 one this 2008 kodiak thx
    Nope, any VAN or Kodiak will not work at all with a Pickup single or DSP2 or DSP5 tune.

    You have to use correct OS for that Kodiak Only single tunes only.

    It just will not work
    Last edited by GMC-2002-Dmax; February 25th, 2019 at 06:51 AM.
    www.ridgerunnerdieselperformance.com

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  9. #9
    Lifetime Member DURAtotheMAX's Avatar
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    Its simply because the starter relay control is wired differently on the GMT-560 (kodiak) and GMT-610 (van).

    Pickup cals are setup to use a high side driver in the ECM (mapped to pin XYZ on one of the ECM connectors) to apply 12v to the coil of the starter relay. Kodiak/van use a low side driver (mapped to a different pin) to apply ground to the coil of the starter relay.

    Change some wires around in the harness, OR poke around in the ECM binary (to tell it which starter relay hardware config to use) and it should be easy to make a pickup OS work in a kodiak....
    2005 Silverado, CC/SB, 4x4, LT, LILLY/Allison
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  10. #10
    Lifetime Member THEFERMANATOR's Avatar
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    Quote Originally Posted by DURAtotheMAX View Post
    Its simply because the starter relay control is wired differently on the GMT-560 (kodiak) and GMT-610 (van).

    Pickup cals are setup to use a high side driver in the ECM (mapped to pin XYZ on one of the ECM connectors) to apply 12v to the coil of the starter relay. Kodiak/van use a low side driver (mapped to a different pin) to apply ground to the coil of the starter relay.

    Change some wires around in the harness, OR poke around in the ECM binary (to tell it which starter relay hardware config to use) and it should be easy to make a pickup OS work in a kodiak....
    I believe Josh said he did just this with the dumpster van so he could run DSP5 on it.
    1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
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