GM Can info & knowledge share

[Tre-Cool]

Attached is an excel file with the factory CAN TX/RX id's for various operating systems for ECU & TCM's

You will see a bunch of common id's that are used across the various platform. There also seems to be a bunch of id's that are on that don't need to be. i.e the rx device the id is sending the data to, doesnt exist. it's just more shit being broadcast.

Anyway hope it helps.

T43-CAN-Data.xls

[tonn0297]

This is awsome knowledge, thanks for sharing.
Have any found out the minimum required data to send to a E92A ecu to keep it from giving error when the 6L is not connected?
Also have any tried to send torque reduction / throttle blip via can and having it work?
Im working on integrating 8hp via maxxecu to a gen V oem controller. But Maxx says some of the ID's are the same so they will clash, im trying to get them to list the ID's.

[kippdipp]

Attached is the .dbc for $191, $199, $19D, and $2D1. Which are NOT found in GMW8762.

[kippdipp]

Have you logged $19D yet?

19d.png

1A1 - BINGO, WINNER WINNER CHICKEN DINNER. shifted 1,2,3, then when it went for 4th big old neutral gear. tapshift went straight to neutral. doesnt even flag dtc codes. re-enabled to continue below.

18E - shifted, but firmness was a bit hard.

1a1.png
18e.png

Where are these snippets you posted from?

[nmstec]

Have you logged $19D yet?

19d.png

1A1 - BINGO, WINNER WINNER CHICKEN DINNER. shifted 1,2,3, then when it went for 4th big old neutral gear. tapshift went straight to neutral. doesnt even flag dtc codes. re-enabled to continue below.

18E - shifted, but firmness was a bit hard.

1a1.png
18e.png

Where are these snippets you posted from?

? From my DBC?

[tonn0297]

this is interesting, i see the 0x1C7 CAN id. do any have a log with a traction control even of gen V before 2020?
Only other way to pull timing is emulating something from the AT trans, or using the adaptive cruse control, both not as great..

[Gatecrasher]

do any have a log with a traction control even of gen V before 2020?

I should be able to pull one off my Corvette. What do you need? Just enough traction intervention to make the light flash?

It's a 7 speed manual though, so I don't know if that'll help.

[tonn0297]

I just need to see what changes in the can data on a traction event, so if you can do a log with 2 or 3 events at varying levels of power cut that wuld be awesome

[Gatecrasher]

I'll give it a try this weekend.

[kippdipp]

Attached is the .dbc for $191, $199, $19D, and $2D1. Which are NOT found in GMW8762.

I updated the attachment. I believe these are the missing key torque reduction messages / signals.