2002 Escalade 4l80 swap

[novaman996]

Have a computer, harness from 2002 Escalade 6L 4l65, drive by wire.
Operating system OS12209203.
I want to convert to 4L80.
There is no system swap that I can use.
GM never put a 4L80 behind a 6L Escalade/drive by wire..
I tryed to do a tranny manual swap but some parameters were exceeded.

Richard

[Jon S.]

Escalades with the LQ9 6.0L engine, in early 2002 production used OS 12209203 - in later 2002 production they typically used the more common OS 12212156.

GM did not release a programming update for these - meaning whatever OS your particular vehicle came with, was the OS that it would always use.

Find a 2002 Escalade calibration that uses OS 12212156, then you will be able segment swap the 4L80 transmission segments from a 2002 HD truck, into your new Escalade calibration.

[general23cmp]

Novaman, did you ever have any luck with this? I have an 02 Escalade LQ9 likely with the early OS and want to put a 4L80 in as well. What did you do?