Why cant tune a 97 4.3?

[tiresmokinV8]

My cousin has a 97 s10 4.3 and I am planning on getting hptuners in the next couple months and noticed that his cant be tuned with it. I just wondered why. Its a vortec like my truck and the pcm looks the same except he has a round plug going into the center of his pcm along with the 4 flat plugs. It would be cool to be able to tune his since Ill have the system for mine.

BTW I have a 2000 Sonoma 4.3 4l60E

[Bill@HPTuners]

Because it doesn't use the same pcm as anything we currently support. While it may look similar on the outside the internals are probably very different.

[tiresmokinV8]

Thanks!

[dwaynep2]

Have you ever herd of anyone swapping out the 97 PCM with a 98 up?...I know it would probably have to be rewired but with the right diagrams and some patience i dont see why it wouldn't work1

[CTX-SLPR]

As an example, doing so in a W-body with the 3800 would render certain pieces of the dash non functional in some cars due to the change in the data bus. A complete change over could involve as much as replacing dash and other vehicle items to get everything compatable.