GM Can info & knowledge share

[hjtrbo]

Happy to help you out getting set up in ghidra. Flick me a pm or ask back here.

[andbel]

I'm working on decoding the T43 TCM <-> E39 ECM torque messages.

I am also looking to learn more about TCM<>ECM integration on the same E39 test mule actually. I am trying to actually replace E39 with my own ECU, what's your project?

[series8217]

I'm working on decoding the T43 TCM <-> E39 ECM torque messages.

I am also looking to learn more about TCM<>ECM integration on the same E39 test mule actually. I am trying to actually replace E39 with my own ECU, what's your project?

Nice to see you on here. I am doing the opposite thing: I am trying to replace the 6T70+T43 with a gateway/translator for a different automatic transmission.

[ocerrr]

Does anyone have GMW8777 Transmission?

[GregJo]

I am also looking for these GMW documents as I have an LS2 and auto in a MB sprinter and translating MB to GM and back again…
Stumbling on cruise and TUTD at the moment
E38 ECU

[Tre-Cool]

I have most of them, problem is they are watermarked pdf files with my details.

[turbostew71]

Does anyone have GMW8777 Transmission?

yes please!

[turbostew71]

Hey all, first time poster, long time lurker. I am working on a project shown here:

https://ls1tech.com/forums/automatic-tr ... oller.html

I am working on a 07 Escalade with L92 and e38 ecm. I am trying to decode $199 (TCM -> Engine Torque Request) and $19d (TCM -> Engine Speed Request). I want these for torque cut and engine blips for shifting. I don't see a $189 message ever (limited driving conditions though). Seems series8217 has good info on the $199. It is interesting that the gmw8762 has about every other can message I see on the bus but these. GM worried about liability exposing these? What gives? Anyway, I no longer have a vehicle with a 6L80 (now have 10L80) to hack. I was hoping someone might shed some light on the $19D. Thanks.

[MPC001]

Hey all, first time poster, long time lurker. I am working on a project shown here:

https://ls1tech.com/forums/automatic-tr ... oller.html

I am working on a 07 Escalade with L92 and e38 ecm. I am trying to decode $199 (TCM -> Engine Torque Request) and $19d (TCM -> Engine Speed Request). I want these for torque cut and engine blips for shifting. I don't see a $189 message ever (limited driving conditions though). Seems series8217 has good info on the $199. It is interesting that the gmw8762 has about every other can message I see on the bus but these. GM worried about liability exposing these? What gives? Anyway, I no longer have a vehicle with a 6L80 (now have 10L80) to hack. I was hoping someone might shed some light on the $19D. Thanks.

Ditto long time observer/learner (lurker )........

Maybe you are aware but FYI 08 C6+ has throttle blip for TUTD. Change to 08 trans OS?

[Gatecrasher]

GM worried about liability exposing these? What gives?

They believe it'll give away a 'competitive advantage'.

As if someone with the resources of say Ford or Honda couldn't easily reverse engineer it if they cared to.