I am in the process up installing a 4L80E, 6.0, and blower into my truck. It is a 2000 Silverado Z71. I originally had an 01 Silverado with all the same mods, except it was a 2wd. I put it back to stock and kept the PCM.
Here are my questions;
How can I upgrade the 2000 PCM with the 01/02 OS so I can have the custom OS?
Should I install my old 2001 PCM? Is there any advantage in doing so?
If I install my old PCM, can I change the VIN? I read there may be some issues with the PCM/BCM not talking if the VIN's are different?