L31 411 4x4 swap

[1project2many]

I do not know. Do you have tools to open and modify the calibration?

[Dewman67]

I have pcm hammer, ls Droid, and tunerpro. Just trying to figure out if I need to start with a flex file and swap in a 4l80e. I think the trans swap is more common.

[1project2many]

That makes sense. Unfortunately I don't have tuning tools set up on this pc so I am unable to check that file. If you can't see the options using your tuning software maybe you could grab the VIN and use https://tis2web.service.gm.com/tis2web/ ?