good morning all ! I've searched high and low and unless (and very possible) I'm a dumb dumb , I can not for the life of me find a 4l80e file to swap over. Its a 07 5.3 suburban os 1250212. what are my options if any sorry for my lack of skills here.
The TCM OS has to match, the ECM OS is irrelevant. 1250212 is not a TCM OS. GM built '07 Suburbans with 4L80E so there are stock calibrations available.
2007 Suburban 3GNGK26K77G211058 6.0 4L80E - TCM OS 24235341.hpt
If that file does not match your TCM OS, you can either do a write-entire for ONLY the TCM, or use that VIN with GM SPS and flash only the TCM. I believe the second option will require buying fewer credits.
AAHHHH thank you for clearing that up. Im not great with this and thought the ecm os had to match too and was loosing my mind. Thank you very much . I have alot of reading and learning to do here thanks for being a great community
I wanted to say thank you to blindsquirrel , did as you said and it took it. My only issue now is with the prndl and the indicator line under the selected gear, it shows P and auto-lock unlock works when shifting out, but the line goes away in R N D 3 and returns for 2 and 1. I'm using the stock 4l60e neutral safety as to keep stock wiring. I swapped out switches with zero change in display. I checked the coding on the PRNDL and NSBU and they match 60 tune for 80 tune. Only wire mods were done is the sloppy mechanics t42 repin, nothing on the prndl wires.
I think if you want it to use a '07 Suburban 4L80E TCM calibration, you should re-build the wiring & other components as if it were a '07 Suburban that came with a 4L80E. This isn't a cooking show, a little of this, a little of that, a pinch of that from over there...
If you could post a tune file or a VIN it would help me a lot with checking for programming/wiring differences.
2007 Suburban 3GNGK26K77G211058 6.0 4L80E - TCM OS 24235341.hptsuburban 4l80e dod off vss serial.hpt . first file is swap file second was stock 4l60 file. its a 07 ltz 4x4 5.3 vin 1gnfk163x7j170213. Sorry for my lack of knowledge and big thanks to blindsquirrle for dealing with me. also this is the wiring done https://sites.google.com/site/sloppy...-nnbs-t42-swap
Last edited by 07redsled; 03-25-2021 at 04:57 PM.
I had that issue before. The pin in the TCM that you swapped over has pulled out or not making good contact.
1961 C-10 5.3 NV3500
2007 NNBS ECSB 4.8
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