I've been hearing how the 99 pcm sucks and you should change it for a 02 pcm. no if i wanted to do this do i need to get a actual pcm or can i have nelson just program my 99 so its like a 02? and if i need to get a new one were is a good place to pic a 02 pcm up and what would one cost.

 

nelson will probably swap it for an o2, he swaped out my 2k, but if i remember their is a wire for the alt that needs to be run

 

You have to add the wire and get a 02' alternator as well or you'll have the flashing battery light all the time.
Or just have it turned off with a tune.

 

Yea, I think that Nelson figured out a way to turn it off with the tune...I installed a 145a alt (just like in creederado's write up) and ran the wire to the PCM (can't remember which pin though). Works like a charm. You're probably best off finding a donor 02 PCM core...not sure what's involved in trying to flash the 02 logic into the 99...I think they use different operating systems or something like that

 

I bought a 02 pcm to use for a core exchange at www.car-part.com about a year ago. Cost $50 shipped, didnt use it and sold it for $80...

 

Is this upgrade necessary for 2000's also?

 

As far as I know it is for 99 and 00 both.

 

is it just faster and more tunable or what

 

no, nelson upgraded mine to an 02 and i had no battery light, i'm pretty sure it's just 99's

 

when i talked to allen he told me he can get better timing with the 02 pcm