2001 Silverado 2wd PCM into 2000 Silverado 4wd

[LastCall]

Is there a difference in the PCM between an 01 2wd Silverado and 00 Silverado 4x4. I would like to swap the PCM from the 2wd into the 4wd.

What would I need to do to make the swap work? Can it be done?

[ScarabEpic22]

Swap them, flash whatever 00, 01, 02 OS you desire...Id upgrade to an 02 OS if you're going through the hassle though!

So no, no differences between the PCMs. 2WD/4WD is just in the calibration, even then its usually just an input pin from the main harness and not actually a different calibration.

Why are you wanting to do this, is one PCM dead?

[LastCall]

I have used the 01 PCM for the last 2 years without any issues and it has a custom OS with my engine/blower/trans tune. Also, the 99/00 PCMs seem to have issues with knock and have less tables than the 01 and 02.

[ScarabEpic22]

The 99/00 OSs do have less defined tables, I would upgrade to an 01/02 OS on the 00 PCM and then tune it from there. Just make a note of what changes you've made and copy them to the 01/02 tune, full flash it into the 00 PCM and be done.

There are no physical differences in the PCM hardware, you can put a 99, 00, 01, or 02 OS into pretty much any 512kb LS1 PCM. There are some that dont have provisions for ETC, if that is the case then you couldnt use it on a Vette.