How to identify what year PCM I have.

[RollOut]

When I bought my car I was told that it had a PCM out of an 02 b/c of something to due with tuning. Suppose to make it easier or something. Anyway as I've completed more and more work to the car I've found about 50% of what I was told was bullshit. So basically what I'm wondering is if there is in fact a benefit to upgrading a 98 pcm to a 02, and if so how could I confirm this has been done.

[joejenkinsglass]

good question. Sounds like you bought your car from the same guy I did. The 99 and up ecm is faster from what I have read. I do not know how to tell the difference. I do know that the plugs are the same just pinned differently.

[pajeff02]

Here is a thread that talks about some of the differences and swapping from a '98 to newer PCM: http://www.ls1.com/forums/showthread...cm+differences Sounds like a lot of work, so probably unlikely that the PCM has been swapped out.

[pajeff02]

As best I can tell, we do not have a listing of the PCM identification numbers by year. Here is a chart that I found: http://www.chevythunder.com/LS1%20co...Identification This should answer your question as to what year PCM you have, assuming the information is correct.

[Firebirdjones]

If you tune with HPtuners, it will tell you right away what year computer you are dealing with. Just a heads up.

[Frost]

you can post a pic of it and I can tell you...