Soon GM is coming out with a Gen IV 5.3L(LH8 ) equipped Canyon/Colorado. For some reason they are sticking a 4L60E in it. :( The truck will come with a E67 ECM.

What I'm wondering is what would it take(ECM/TCM wise) to swap say a 6L90E into one of these things?

I've heard that the ECM and TCM would need to be flashed with the OS from a vehicle with the same combo as what the swap is(E67/6L90E). Currently there is no vehicle that has a E67/6L90E combo. Can a E38 file be flashed into a E67 ECM? All the trucks that use the 6L90E have E38 ECMs.

I'm just trying to get a better idea of what would be involved from a computer stand point in doing a swap like this. In the old days you just flashed in the appropriate OS and swapped a few pins around on the 4L60E to 4L80E swap.

Thanks