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Thread: 8.1L PCM available OS upgrades?

  1. #1

    8.1L PCM available OS upgrades?

    Does the PCM that comes in the 8.1L trucks have available OS upgrades to 2 & 3 Bar SD?

  2. #2
    Advanced Tuner
    Join Date
    Oct 2013
    Posts
    550
    Yes ...

    512Kb (P01)

    2001 OS12208322 (1 BAR, 2 BAR, and 1 BAR MAF enhanced available)
    2002 OS12216125 (1 BAR and 2 BAR available)


    1Mb (P59)

    2003 OS12579405 (all VCM enhancements are available)
    2004 OS12587603 (all VCM enhancements are available)


    Just took a quick look ... no doubt there are probably more options available for the 8.1L.

  3. #3
    Senior Tuner
    Join Date
    Sep 2008
    Posts
    1,668
    If your specific OS doesn't have what you need, just write entire with another OS from a 5.3/6.0 or even an LS1/LS6 if you've got a compatible year...then copy the stuff that makes the 8.1 run into it.
    2010 Camaro SS M6. Stock Bottom End, Heads/Cam/Intake/Headers/Exhaust.
    2005 Silverado RCSB. Forged 370 LQ9/Borg-Forced Inductions T6 S484/Jake's Stage 4 4L80E with D3 Brake/4WD.
    2023 Durango Hellcat