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Thread: Making changes to 4l60e

  1. #1
    Potential Tuner
    Join Date
    Feb 2025
    Posts
    9

    Making changes to 4l60e

    Just recently got hp tuners and read up about how you should never use write entire except in certain situations. For whatever reason, on my 03 Silverado 1500 it doesn't give me an option to write tcm. So my question is will write calibrations also change my tcm or do I need to use the write entire and pray I don't brick it?

  2. #2
    Tuning Addict
    Join Date
    Apr 2017
    Posts
    10,196
    2003 has a PCM (Powertrain Control Module) because you have a Gen 3, engine and trans are run from that one single box. Gen 4 has separate ECM and TCM.
    Quote Originally Posted by SiriusC1024 View Post
    I think they're junkyard rebuilds.

  3. #3
    Potential Tuner
    Join Date
    Feb 2025
    Posts
    9
    Thank you!