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Thread: 2005 GTO wiring question

  1. #1
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    2005 GTO wiring question

    I'm putting an 05 GTO drivetrain into a 1959 impala. I'm in the process of converting the original harness. Going well but I do have one question. Both the ECM and TCM have a yellow wire labelled accessory voltage. I find the double relay set up feeding this circuit a little confusing. Is it an accessory voltage feed from the ignition switch and does it need to be connected on a swap?
    Thanks in advance!

  2. #2
    Registered Member fitz's Avatar

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    The GM factory service manual for that car is available here:

    http://www.auto-repair-manuals.com/G...FQp3fgodNnACLA

    Buy the book and look up everything you will ever need to know about the 2005 GTO

  3. #3
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    I have an 06 GTO powertrain in an 04 Miata. I'm beginning to research the yellow accessory wire too. Will report what I find here. Almost everything else is sorted.

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