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Thread: Do I have to have a commercial license to upgrade OS?

  1. #11
    Joe (Moderator) joecar's Avatar
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    Are the two PCM's compatible...?

    Is your Silverado's PCM 512KB...?
    Is your GTO's PCM 512KB or 1MB...?

    Try flashing the 2002 F-car 12212156 tune into your PCM.

  2. #12
    Joe (Moderator) joecar's Avatar
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    Pinouts might be slightly different (I haven't checked all of them...).

  3. #13
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    The GTO PCM is 1MB. The connectors are blue/green.
    The Silverado PCM is 512kB. The connectors are red/blue.

    Both vehicles are cable throttle.
    Last edited by Diarrheabetes; August 9th, 2018 at 08:08 AM.

  4. #14
    Joe (Moderator) joecar's Avatar
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    Ah, you would be swapping PCM's...

    We would have to get hold of the PCM pinout diagrams and compare them

    ( they are available on the internet some place, I don't remember where )

  5. #15
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    So here's what I'm understanding, I use the GTO PCM (depending on pinout), do a full pcm flash to custom os, then do a calibration only flash for the 'tune'.

  6. #16
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by Diarrheabetes View Post
    So here's what I'm understanding, I use the GTO PCM (depending on pinout), do a full pcm flash to custom os, then do a calibration only flash for the 'tune'.
    What OS is in your PTO PCM...?
    Is it listed in the LS1B COS tutorial...?
    If so, then yes, correct.



    ( and, if the pinout is different, you can repin the connectors, this is simple to do )

  7. #17
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    Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do. Use the 02 OS 12212156 for a Silverado and start with that as your base file. If this is a swap, you can use a Camaro file too, just note the pinouts change. I *believe* the 00 and 02 Silverados have the same PCM pinout, I'd recommend double checking. Look at the DropBox for a base file, there are a few to choose from. Simply Full Flash this file into your 00 PCM and then begin the COS tutorial (replace .tun w/.ctz as Joe said).

    Follow the COS upgrade tutorial from there, this OS gives you COS5 which is the best COS EFILive has for the 512kb LS1B PCMs.
    ~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.

  8. #18
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    Quote Originally Posted by ScarabEpic22 View Post
    Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do. Use the 02 OS 12212156 for a Silverado and start with that as your base file. If this is a swap, you can use a Camaro file too, just note the pinouts change. I *believe* the 00 and 02 Silverados have the same PCM pinout, I'd recommend double checking. Look at the DropBox for a base file, there are a few to choose from. Simply Full Flash this file into your 00 PCM and then begin the COS tutorial (replace .tun w/.ctz as Joe said).

    Follow the COS upgrade tutorial from there, this OS gives you COS5 which is the best COS EFILive has for the 512kb LS1B PCMs.
    Awesome! I guess I just need to find a way to double check the pinouts between the two.

  9. #19
    Joe (Moderator) joecar's Avatar
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    Quote Originally Posted by ScarabEpic22 View Post
    Don't bother swapping to the 04 GTO PCM, it will just add more headache to what you're trying to do.
    ...
    +1 I agree, it will be a distraction/tangent.

  10. #20
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    Quote Originally Posted by Diarrheabetes View Post
    Awesome! I guess I just need to find a way to double check the pinouts between the two.
    A subscription to AllDataDIY may provide the info you need for a reasonable price, but I'd suggest searching around as I know you're not the first to do this so the info may be readily available!
    ~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.

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