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How to identify what year PCM I have.

This is a discussion on How to identify what year PCM I have. within the Computer & Tuning forums, part of the LSx Technical Help Section category; When I bought my car I was told that it had a PCM out of an 02 b/c of something ...

  1. #1
    Junior Member
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    98 T/A

    How to identify what year PCM I have.

    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.
    LS T56 for sale. PM me for details and offers.

  2. #2
    someday joejenkinsglass's Avatar
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    98 formula

    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.

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    '02 WS.6 / '07 Suburban

    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.

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    '02 WS.6 / '07 Suburban

    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.

  5. #5
    Moderator Firebirdjones's Avatar
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    If you tune with HPtuners, it will tell you right away what year computer you are dealing with. Just a heads up.

  6. #6
    TunedbyFrost.com Tuner Frost's Avatar
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    you can post a pic of it and I can tell you...

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