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Thread: Installing new ECM - What to expect??

  1. #1
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    Default Installing new ECM - What to expect??

    Hello All,

    I have a new ECM arriving in the next few days. Lets "assume" it is flashed with my stock OS (15228758) and programed with my VIN correctly (by vendor).

    Do I simply follow proper ECM removal/install procedures or are there RELEARN procedures I must do?

    Thanks everyone!
    05 GMC Sierra 2500HD CC LB LLY Allison 4x4
    - AFE Stage II intake
    - EFI Live FlashScan V2: firmware v2.06.24 / bootblock v2.06.02
    - Tune(s): Stock

  2. #2
    Lifetime Member GMPX's Avatar
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    You will probably need to do a theft relearn. I don't recall the exact proceedure but it's something like leaving the key on for 10mins, three times over and it's done.

    Cheers,
    Ross
    I no longer monitor the forum, please either post your question or create a support ticket.

  3. #3
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    Thanks, Ross. Yes, from what I've researched so far a VATS relearn is a minimum. Does anyone know if a CKP relearn is needed for an LLY (or diesel for that matter.)?
    05 GMC Sierra 2500HD CC LB LLY Allison 4x4
    - AFE Stage II intake
    - EFI Live FlashScan V2: firmware v2.06.24 / bootblock v2.06.02
    - Tune(s): Stock

  4. #4
    Lifetime Member killerbee's Avatar
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    This didn't come from me, did it? I include detailed color installation guide with each custom program ECM. People should not have to ask "what do I do with this" after spending a fair amount of $.
    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"

  5. #5
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    thanks for your concern, Killerbee, and no, it was not from you. I was getting ahead of myself in anticipation of receiving the unit. Yes it did come with very detailed instructions but I wanted to get more information from all that have gone down this road before.

    What I did find that no one has mentioned was the VAT-relink feature in the Tune Tool. Am I missing something? Does this do the same thing the VATS RELEARN procedure accomplishes or is it better to perform the typical VATS RELEARN process?
    Last edited by juscruzn; January 19th, 2010 at 04:45 AM.
    05 GMC Sierra 2500HD CC LB LLY Allison 4x4
    - AFE Stage II intake
    - EFI Live FlashScan V2: firmware v2.06.24 / bootblock v2.06.02
    - Tune(s): Stock

  6. #6
    Lifetime Member Cougar281's Avatar
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    The VAT relink in EFILive will work just fine; the try to start and wait 10 minutes three times is for if you don't have a tech 2 (or in this case EFILive) to preform the relearn.

  7. #7
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    Quote Originally Posted by Cougar281 View Post
    The VAT relink in EFILive will work just fine; the try to start and wait 10 minutes three times is for if you don't have a tech 2 (or in this case EFILive) to preform the relearn.
    Thanks for the input Cougar!! Silly me, I assumed EVERYONE has a FS V2. This thing is so cool to tinker with... That makes sense that you can do it "manually" or with a tool (Tech 2, EFILive, etc.)
    05 GMC Sierra 2500HD CC LB LLY Allison 4x4
    - AFE Stage II intake
    - EFI Live FlashScan V2: firmware v2.06.24 / bootblock v2.06.02
    - Tune(s): Stock

  8. #8
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    Default ECM installed and working

    For the curious and fellow NOOB's...

    I finally got a chance to install my spare ECM. All went as planned. Here's what I did.

    Swap out ECM's:
    1. Disconnected BOTH batteries.
    2. Removed plastic cover from box that housed the ECM.
    3. Disconnected 3 connectors from ECM: Blue, black, grey.
    4. Reverse above for installation of new ECM.

    VATS RELEARN:

    1. Crank engine - It may or may not start. (Mine did not start.)
    2. Leave key in ON position - not accessory. (Security light will turn on.)
    3. Wait 10 minutes for SECURITY light to turn off. (My light turned off in 7 - 8 minutes in which time I went to step 4.)
    4. Turn key OFF for 30 seconds.
    5. Repeat steps 1, 2, 3, and 4 two more times for a total of three times.

    My truck started after three sequences of CRANK-wait-CRANK.

    Thank you everyone for your help!
    05 GMC Sierra 2500HD CC LB LLY Allison 4x4
    - AFE Stage II intake
    - EFI Live FlashScan V2: firmware v2.06.24 / bootblock v2.06.02
    - Tune(s): Stock

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