I have a 1997 Blazer that is blown but I also happen to have a 2000 old's bravada both with the 4.3 Vortec. I am planning to swap the Old's motor into the Blazer but I do not know if i should use the Blazer harness or the Old's harness for the 0411 PCM. I know either way will take some work if its re-pinning the Blazer harness to fit the 0144 PCM or having to swap certain sensors for the 0411 PCM. I would just buy one but i cannot find one anywhere. Basically what I'm saying is I want to use the 0411 PCM with everything functioning as normal but I'm not sure what rout to take.

I am aware the 0411 needs flashed.

 

It may be more complicated than you think to use the 411 pcm in the 97 Blazer and have everything working. 2000 has a BCM running a lot of things like lights, security, locks, etc and 97 does not. Programming would have to correct for this as well as other differences in other vehicle modules like the instrument cluster and configuration. It's more than the engine wiring harness.

Do the best thing and just use the original pcm and harness already in the 97 Blazer with the newer engine. Switch over any accessories on the engine (if different) to 1997 configuration and you will be golden.