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  1. #1
    Join Date
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    While you have everything out go ahead and stck a transmission oil cooler in and make your brackets for electric fans. The LS1 fans work great!


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  2. #2
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    What about ABS I noticed when I pulled out the old harness some of the plugs on it went to the ABS module. I was under the impression it was a standalone system... Will I be able to retain it easily or what?
    Tired ol' 5.7, 5.3 swap in progress
    Handle every stressful situation like a dog.
    If you can't eat it or hump it.
    Piss on it and walk away.

  3. #3
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    Quote Originally Posted by aarolar View Post
    What about ABS I noticed when I pulled out the old harness some of the plugs on it went to the ABS module. I was under the impression it was a standalone system... Will I be able to retain it easily or what?
    Yes it's standalone but if I remember correctly for it to work you'll need to tap into the VSS or the ABS light will stay on.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  4. #4
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    Whats the VSS? I belive there were two plugs on the front of the ABS module that I had to unplug to remove the harness. Do I need to remove those plugs from the harness and splice something into them?
    Tired ol' 5.7, 5.3 swap in progress
    Handle every stressful situation like a dog.
    If you can't eat it or hump it.
    Piss on it and walk away.

  5. #5
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    No, leave the ABS plugs in it. There should be a white VSS wire that goes from the EBCM to the vortec VCM. You'll need to get a signal from the new PCM to the brake module. I want to say it's the C1 connector pin 15.


    97 GMC, 2002 LS6.

    1991 GMC Syclone #1428

  6. #6
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    You are loosing me with all the acronyms, There are no wire coming from the ABS module to splice to they unplugged from the module and went with the old harness.
    Tired ol' 5.7, 5.3 swap in progress
    Handle every stressful situation like a dog.
    If you can't eat it or hump it.
    Piss on it and walk away.

  7. #7
    Join Date
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    Quote Originally Posted by aarolar View Post
    You are loosing me with all the acronyms, There are no wire coming from the ABS module to splice to they unplugged from the module and went with the old harness.
    The VSS means Variable Speed Sensor. Its a sensor plug-in on the rear tailstock of all our transmissions that runs forward & is part of the engines computer wiring harness. The white wire that Lance mentions, comes from your/our newer LS computer, and is a source of a VSS signal that the ABS brake module needs to see, to operate the anti-lock brake system(ABS) properly. All of the yellow tape wrapped plug-ins that were connected to your ABS module, need to be put back. They were not part of your old engines harness. There was only one wire(or two) that was part of your old engine/transmission harness that you should cut from the ABS module. This is a VSS signal wire that can be had from the new LS computer. The one Lance mentioned. Contrary to what others say about needing the old trucks computer, it is not needed for the ABS. Follow?

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