My 2000 silverado that is a 4.3 truck I started pulling the engine and noticed the pcm has four plugs and is black. I thought they were the same physically as the v8 pcm? I have a harness on the way from a 2000 2500hd 2wd truck so I guess I need to get a pcm now that will work with it, is there a certain year pcm I should look for?

 

What engine are you puttin in the truck? im guessing a v8 since your using the harness from a 2000 2500HD?

Your gonna need a LS1 Pcm.

 

6.0 and 4l80, Could I just get a PCM from a v8 silverado like the one that was in the truck my harness came from? I remember hearing an 02 pcm is a good place to start, it has a better OS?

 

Yea.. but any 99-02 PCM will work.. you tune or gonna get it tuned to take care of the VATS?

If you get any of the PCMs you can do a OS change to use the 2002 12212156 OS

 

Yea I have hp tuners I was just gonna just do it to my pcm from the truck but come to find out I guess the v6 ones are different. Now I need a pcm.

 

oh ok.. yea you should be fine then..
check the junkyards, usually you can score one for $75 or so

 

Yea I'm gonna look around and I'll post it up on here also that I need one