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Thread: psi harness help

  1. #1
    Join Date
    Oct 2014
    Posts
    26

    psi harness help

    1995 Silverado 4l60e swapped to a lq9 dbc..who can help me with the finishing touches on the psi wiring harness? I only need help with the under dash hookups. where do I tie into my stock mil lamp? how about the speedometer?i have cruise control added into the pcm but where does it hook to my stock cruise , right at the cruise module on firewall?I asked lextech but he only does 96 and newer any help would be appreciated I have looked through the threads and find different ways things have been done but nothing specific to my application
    Last edited by rob; 05-29-2015 at 08:58 AM.

  2. #2
    Join Date
    Oct 2014
    Posts
    26
    Also wondering if I can just remove my old ecm or if it actually controls other things in the truck not related to the old engine?

  3. #3
    I have psi harness also. But i have a 91 silverado and i just took out every thing or cut it. You don't need the stock ecm only if your going use the trucks tranny, if yours upgrading to 99- up tranny just delete the stock ecm.

  4. #4
    With the underdash wires can't help you there. I'm planing on autometer gauges

  5. #5
    Join Date
    Dec 2013
    Posts
    22
    While I don't recall the exact wires, I can tell you on my 92, all of those can be hooked up behind the glovebox. I left my stock ecm in the truck.
    1992 rcsb 5.3 lm7, NV3500
    2012 corvette vert, ls3
    Both tuned by me with HP Tuners

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