Just wondering if this would work, I know that swaping a 99 pcm to a 02 pcm will make a world of diffrence. I work at a dealership and I have heard something about taking the program out of the 99 pcm and uploading a 02 program back into the 99. I'm not really good with the Tech2 but getting better with it. Just wondering if this would work or if any one has tried it.

 

i am interested in this also

 

yes they will work with turning off the alternator sensor in the pcm. or i think creedarado found out how to make the battery light go off by adding a wire to the pcm from the alternator. heck yay it will work.

 

heres my old post.
old post

Allen Nelson (farmtruc) at Nelson performance has tuned my truck and I highly recomend him if you don't use edit or Hp tuners yourself.

I believe he has figured out a way of eliminating the need for the extra wire.
You might want to give him a shout for a tune while your swapping the pcms.
he is a sponsor.

 

i knew that bad *** truck was lurking here. they need to make this a sticky or somehwhere to put it.

 

I did it and it works great. I just added the wire to the alternator.

 

The 02 PCM is definitely the way to go...not sure if you can load the 02 program into a 99 PCM though. I think Big Tex mentioned something about there being a difference internally between the two.

 

I have a 2002 pcm in my father's 99 model truck. I left the 2002 program in it since it is so much better than the 99's. I also, with the help of allen, adjusted the tune to give a little extra power. You also must turn off a DTC for generator circuit terminal "xx" I forget which one it is. Easy swap, but if you don't have a tuning program you will have to add a wire from the alternator to the pcm.

 

Yeah, there is more memory in the 02 pcm. The 02 program wouldn't fit in the 99.

 

Interesting......this is kinda a side note, but I feel its along the same lines as all the other questions.

Say I have a 2000 truck, and I swap to an '02 PCM. Now lets say I want to get HP tuners. What year vehicle would I buy for, 2000 or 2002?