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
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