Quote Originally Posted by stepside97 View Post
im new to this forum, im wanting to do this swap on my 97 with a 5.7 in it right now and i was wondering if i need both pcm's?
Nope you don't need both. I was able to Eliminate my stock pcm. If you search through the lsx conversion threads there's a guy called wayoung or something. He put a 4.8 into a 97 suburban. If you read his thread he tells you how to eliminate the stock pcm. I'll look later and see if I can find my notes from when I did the wiring . It's pretty easy because the wires that went to the stick pcm can be removed and plugged right into your ls pcm.