I plan on doing a 5.3 swap this winter and I was wondering what the differences are in 99-2002 pcm's, or what one would be best to use in my swap. The motor is a 2004 but im switching it to a cable tb with a 2001 harness.

 

i think most everyone uses the 02+ pcm's

i'm stickin with my 99 pcm cause it still works :p

 

Yup go with an 01-up pcm.. service number will end in 411.. I went from a 99 to 02 pcm and it was the best thing ive done.. was getting a ton of false knock with the 99 and almost zero with my 02..

 

good point, i havent ye tto check my kr tables, still playing with the newness of my efi live

how did you go about doing the swap?

plug and play? or did you have to get the pcm vin unlocked or something?

i dont want to waste a vin licinse if i swap pcms.

-Erik

 

Yelo has had great luck tunning a 99.
Read this
https://www.performancetrucks.net/fo...&highlight=PCM

 

Thats a good article by Yelo.. I had Allen Nelson tune my truck (before I got hptuners) so he just sent me an 02.. I put it in place of the 99 and it worked just like normal.. except it ran a lot better.. I would try what Yelo did, and see what kind of luck you have with that..