2008 e38 truck ecm to manual transmission

[etizz]

So heres what i have.

- 2008 escalade chassis with ecm, bcm ,column with key, instrument cluster, fuseboxs. swapped with an old car body

i've driven this car a few miles as it sits but nothing longer due to other factors with the body etc.
i dont have to but eventually i'd like to swap it to a manual transmission if i could.
i've read a few things about the vss 158 mph issue and tweaks there and jumping the tcm can wires if the 6l80 isnt there anymore.
my question is what do i need to keep in order for the vehicle to start and read speedo signal and other than the vss 158 mph guidelines is there anything in the tune i would need to mess with so it would run ok?
i've read people doing g8 manual swaps but those came factory manual in the us from other tunes. i know that 08 up silverado 3500s in mexico came factory with manual transmissions but i havent had much luck finding any tune info from them. if it didnt have bcm and factory cluster etc i could probably just stand alone everything but id like to keep all of those things so i have correct fuel level and alot of oem parts if i need to replace anything down the line. if you need any more information let me know.
Thanks for your time

[etizz]

still curious about this. been gathering parts for a manual swap. from what i understand my 4485 transfer case has a speed sensor, transmission i want to use does not it is a nv3500.
my concerns are as follows again:
read speed from the factory cluster (can)
be able to start it
be able to know its not in neutral for proper air/fuel table usage.

my thoughts are i might just unplug the 6l80e transmission while its in the car and see if i can get anywhere but i was hoping for some guidance on someone smarter than me on this which is probably most lol. Thanks

[blindsquirrel]

Only a manual trans ECM calibration is able to read a VSS directly, and the only data it will recognize as VSS has to be originated in a TCM. Some other module on the bus can't be disguised as a TCM or send data that should have originated in a different module. If the power company calls me and asks me a question about my car insurance, I'm hanging up because something ain't right.

[etizz]

So what if I left the Tcm there to read the transfer case vss to translate to the pcm the speed which then goes to the cluster ?

[o2l8]

I have an e38 from a 2010 pickup I want to put in a circle track car with a Saginaw 3 speed. Can I use the automatic ECM and modify it to work or do I need to reprogram the ECM with a Corvette bin file?
If that is the case, where do I find this been file? I have a VX nano and SPS I can flash the ECM if I need to. But I will need the VIN number from a Corvette in order to get that file correct?

[blindsquirrel]

Plenty of stock files you can harvest VINs from in the repository.

[o2l8]

Plenty of stock files you can harvest VINs from in the repository.

Thank you I guess that should have been obvious.
Has anyone cloned a GMPP or an E-ROD for circle track?

[blindsquirrel]

How would you do that? Trying to use HP Tuners, you'd end up with only 6 of the 8 segments that live in the Gen4 ECM. HPT doesn't read or write the ETC segments. There are GMPP/CPP files in the repository already but you can't flash those files to anything because of the missing segments issue, all you can do is use them for a reference.

AFAIK there's no way to reflash the special no-VIN GMPP/CPP calibrations even with SPS. Maybe if you had a buddy inside GM who could give you a VCI number... yet another reason I'd never have anything to do with those weird quasi-unsupported systems.

[TheMechanic]

Use this 1G1YY25W595113617
with a 12625455 ECM

[o2l8]

THANK YOU so much. It will give me good place to start!

[blindsquirrel]

Use this 1G1YY25W595113617
with a 12625455 ECM

Uh... GM lookup for that VIN calls out a 12612384. 12612384 is '08-'09 (& 63lb IFR limit), 12625455 is '09-'10 (127lb IFR).

edit: MOAR CONFUSION: 1G1YY36W295100795 is from a repository file, 2009 Corvette LS3 manual trans, file absolutely has the 127lb limit... but GM says it also takes 12612384 which I always thought could not interchange with anything using a late-E38 127lb calibration. What's going on?

[TheMechanic]

Uh... GM lookup for that VIN calls out a 12612384. 12612384 is '08-'09 (& 63lb IFR limit), 12625455 is '09-'10 (127lb IFR).

edit: MOAR CONFUSION: 1G1YY36W295100795 is from a repository file, 2009 Corvette LS3 manual trans, file absolutely has the 127lb limit... but GM says it also takes 12612384 which I always thought could not interchange with anything using a late-E38 127lb calibration. What's going on?

I picked that one as I am doing a manual trans from a E1500 late model Gen 4 with a 6L90 and an E78 into a manual trans C10. Had to do a little research on it to find the right combo. That was a convertible non-ZO6 manual trans 2009. I am using that specific VIN also based on my favorite site Shows the 455 ECM.
https://parts-catalog.acdelco.com/acesCat.php?
GREAT parts finder for GM.
This was the thread that made the decision for me.
https://forum.hptuners.com/showthrea...onversion-help

[blindsquirrel]

Why/how does gmpartsdirect.com show 12612384 for 1G1YY36W295100795?

(man, that acdelco site, I dunno... since the 'back' button takes you ALL THE WAY back to the start page, and middle-click to open stuff in a new tab isn't allowed because somebody cranked the javascript knob up to 11, I'm afraid to click on anything lest I lose everything... yikes.)

[TheMechanic]

While navigation is sucky I have found it to be the most accurate on the internet (that I currently know of). I have become so used to it I don't notice the issues.