Hi all... situation is that I have a ECM:
HDW NO. 12589162
SERV.NO. 12689463
YFYA
Original OS is 12613246 with 2 Bar upgrade (12613246 -> 1250068).
LQ9 6.0 on T4 Single 11psi boost and 4L60E.
I am trying to get 3 bar upgrade complete, want to add in Flex Fuel Sensor + tune, and absolutely need a 4L80E segment swap. The motor is staying Drive by Wire.
Questions:
1) Do I need to re-flash the ECM with a better suited OS for my goals?
2) Does anyone have a 4L80E segment for the 12613246 OS?
Last edited by Michael S.; 03-02-2019 at 11:20 PM. Reason: Original OS fixed
You normally have to segment swap with the factory OS and I'm not sure if there is a segment swap with those updated OS's. Maybe someone has one but I couldn't find one.
If your factory OS or updated OS did not come with a 3 bar OS upgrade, then you'd need to find a different OS to work with.
I'm not up on which OS's also allow for flex fuel.
Last edited by 5FDP; 03-02-2019 at 04:29 PM.
2016 Silverado CCSB 5.3/6L80e, not as slow but still heavy.
If you don't post your tune and logs when you have questions you aren't helping yourself.
I believe the P59s had Flex Fuel capability.Originally Posted by 5FDP
Is there a list of compatible OSes for the PCM hardware numbers? Could I do a full write of another OS (not the base for my ECM) as long as the hardware serial is the same?
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