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98 LS1 block work with a 99+ PCM

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  • 98 LS1 block work with a 99+ PCM

    Curious what it takes other than swapping the heads/valvecovers with the coilpacks to make a 98 block work with a 99+ PCM. A 99+ wiring harness is needed I assume.

    I know the 98 pcm is a pain to tune and 99+ is ideal for tuning.

    Also any other differences in sensors or anything from a 98 block that would make using a 99+ harness need modification?
    ------------------------------------------
    2004 GMC Envoy - Tuned, Airraid Intake, rest stock
    2005 Malibu - Stock, anyone have a ecotec factory gm supercharger for me? lol

    5th gen Camaro V6 Forums
    http://www.bowtiev6.com

  • #2
    a 98 harness will work. just have to move a few wires in the connector

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    • #3
      Coolant temp sensor is actually acurate, and uses 3 wores instead of 2 like 99+ cars.
      Can't really remember what else, pinout on the red/blue pcm connectors is diff also I belive.
      1999 Camaro - 6 liters of fury.....

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