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Thread: Engine Calibration 12607032 for OS 12587603 in 5.3L LM7

  1. #1
    Fuel Injected!
    Join Date
    Jan 2020
    Posts
    31

    Engine Calibration 12607032 for OS 12587603 in 5.3L LM7

    I used "04 Chevy 1500 4x2 LM7 12587603.bin" from this forum as the donor OS for an '03 5.3L LM7. I looked up the VIN for the 603 OS in TIS and below is the output. It appears there are new calibrations for the Engine and Engine Diagnostics to solve "Calibration to address oxygen sensor failures during cold ambient starts." Does anyone have a bin with these calibration IDs or more details of the problem it solves? I'm guessing this change would be applicable to all the 2004 vehicles.

    GM Vehicle Calibration Information
    VIN: 1GCEC14T64Z187804
    Controller: PCM/VCM Powertrain/Vehicle Control Module
    Function: Programming
    Calibration History for: Operating system
    Part Number CVN Bulletin # Description
    12606960 00000F63 - Replaces 12585950 and 12587603

    Calibration History for: Engine
    Part Number CVN Bulletin # Description
    12607032 00006E84 - Calibration to address oxygen sensor failures during cold ambient starts.
    12587685 0000C9BB - New calibration for start of production
    12586048 000019A0 - Engine calibration

    Calibration History for: Engine diagnostic
    Part Number CVN Bulletin # Description
    12607074 0000BA77 - Calibration to address oxygen sensor failures during cold ambient starts.
    12587947 000096E2 - New calibration for start of production
    12586207 000085E6 - Engine diagnostic calibration

    Calibration History for: Transmission
    Part Number CVN Bulletin # Description
    12602140 000008BD - New calibration to address customer complaint of second gear start.
    12587979 000024AA - New calibration for start of production
    12586700 0000F8A3 - Transmission Calibration

    Calibration History for: Diagnostic
    Part Number CVN Bulletin # Description
    12578787 00002A74 - Transmission Diagnostic

    Calibration History for: Fuel system
    Part Number CVN Bulletin # Description
    12578797 0000A7EE - Fuel system calibration

    Calibration History for: System
    Part Number CVN Bulletin # Description
    12585935 0000454F - New calibration for start of production
    12578819 00005C04 - System calibration

    Calibration History for: Speedometer
    Part Number CVN Bulletin # Description
    12579021 00005505 - Speedometer calibration

    Print Close

  2. #2
    Electronic Ignition!
    Join Date
    Jul 2020
    Posts
    11
    Check here and see if you can find any with the updated Cals

    https://github.com/Snoman002/Engine-...Ilive-TunerCat

  3. #3
    Fuel Injected!
    Join Date
    May 2019
    Location
    Hampstead, MD
    Posts
    93
    Here you go

    http://www.gearhead-efi.com/Fuel-Inj...ll=1#post84790

    Flashed with TIS2000 based on the VIN you supplied and read with PCM Hammer

    I have no idea what changes were made.

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