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  1. #1
    Newbie
    Join Date
    Dec 2010
    Location
    DuBois, Pennsylvania, United States
    Posts
    1

    Default Wiring diagram needed OBD2 to OBD1

    Switching engines from 1997 engine, 5.7 Vortex to a 1991 for a 5.7.

    Need the diagram to connect bulkhead connector pin outs and colors to perform this.

    Can anybody help? Anybody have access to AllData? I understand they have it but for all the more I play with this, it's not worth the $165 to me for a month's access.

  2. #2
    Legend
    stephan's Avatar
    Join Date
    Sep 2010
    Location
    Far West, Oregon USA,
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    Hey Shawn, welcome to the GM truck club. That may be kind of tough to come by. GM isn't very forthcoming with their w.d's... When I wanted to put a 4L60E in my older truck they wouldn't even share that simple wireing diagram with me.
    1988 Chevy C-3500 2wd (no pic)
    350 c.i. 5.7 L Stock Block, 4 Bolt Mains
    L-31 Vortec Heads, Edelbrock Cam & Intake,
    Holley 650, Flowtech Headers, Magnaflow exh.
    Jet Trans 700R4, B&M Ratchet, 4:10 gears,
    3" susp. lift kit "shadetree"
    No rev limiter, No speed limiter lol


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