2003 M1083A1 Does C7 replace 3126?

[GeneralDisorder]

Thank you for the reply.
So according to the numbers I have a 3126B which apparently I will need a tune on the computer but since you said, if it even drives which I doubt, you know of course what I need to do and that is to see if it moves. And if it does it will mean does it move enough to shift. LOL
I'll get back and I am going to see what the documentation says as if it is labeled as a C7.

Since I am trying this out, I do have a used C7 Acert ECM. Any predictipns as to what happens if I try this one out?
General sir, we will speak later.

C7 ECM will not run a 3126 (correctly, if at all) either. It would not be better than the 3126 ECM you are using. I wouldn't try that.

 

[Lugnuts]

C7 ECM will not run a 3126 (correctly, if at all) either. It would not be better than the 3126 ECM you are using. I wouldn't try that.

When I get these trucks and their problems, sometimes it is just best after diagnostics to see if they start and confirm that the ECM is the problem. I am just saying that if you can start the truck that is 3/4 the battle. I like to know my possibilities to make that happen. Running well is another. After you install an engine, it is nice to hear it runs, holds water, and has oil pressure. The rest is a downhill slide.