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Thread: Looking for 2012 5.3 liter E38 Connector Pin Out

  1. #1
    Super Moderator dave w's Avatar
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    Looking for 2012 5.3 liter E38 Connector Pin Out

    I'm needing help with finding the E38 connector pin out for a 2012 GM 5.3 liter Pickup.

    Thanks

    dave w

  2. #2
    Fuel Injected!
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    I can offer you 2009 which SHOULD be the same, but thats as far as my information currently goes. Pm me an email address if you want it and Ill send it to you in pdf.

  3. #3
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    I have them. Trying to load them up.
    Last edited by S10LS; 04-05-2014 at 09:14 PM.

  4. #4
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    try these
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  5. #5
    Super Moderator dave w's Avatar
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    Quote Originally Posted by S10LS View Post
    try these
    That looks great for the X2 (Gray) connector!

    Hope you can post the X1 (Black) connector?

    dave w

  6. #6
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    Trying. I cant stand Alldata sometimes. And I am not sure about how accurate alldata is.
    Last edited by S10LS; 04-05-2014 at 10:15 PM.

  7. #7
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    This should be it.
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  8. #8
    Super Moderator dave w's Avatar
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    Quote Originally Posted by S10LS View Post
    This should be it.
    Thank you!

    I was able to get some Alldata schematics at my local library, but I could not find the connector pin outs.

    dave w

  9. #9
    Super Moderator dave w's Avatar
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    Quote Originally Posted by dave w View Post
    Thank you!

    I was able to get some Alldata schematics at my local library, but I could not find the connector pin outs.

    dave w
    The attached .pdf has the Alldata schematics I printed from my local library.

    dave w
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  10. #10
    Fuel Injected! brian617's Avatar
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    You get the info you needed Dave? Have ShopKey/Mitchell here if you still need.
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
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  11. #11
    Super Moderator dave w's Avatar
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    Quote Originally Posted by brian617 View Post
    You get the info you needed Dave? Have ShopKey/Mitchell here if you still need.
    I think I'm doing OK. This weekend is when I get my hands dirty with the actual wiring. So far the wire colors and pin outs match the harness. I seem to favor the Mitchell Manual diagrams (before 2002 anyway), so it would awesome if you could post the Michell ECM diagram.

    I'll post up more schematics I got today that should help someone wanting to set up a 2012 harness for stand alone.

    dave w

  12. #12
    Super Moderator dave w's Avatar
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    More schematics.

    dave w
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  13. #13
    Fuel Injected! brian617's Avatar
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    Dave, I've tried to figure out a way to post those diagrams but it seems if ShopKey is protected from duplicating, or I'm just too stupid to figure it out lol. Sorry.
    89 K1500 Scottsdale 5.7L 5spd 3:42 RamJet cam Dart iron TBI heads 427 PCM swap
    95 C2500 Cheyenne 6.5L turbo diesel 4L80e 4:10 DB2-4911 Manual pump conversion 0411 PCM trans control 2Bar COS
    05 Outback XT 2.5L turbo gas auto

  14. #14
    Super Moderator dave w's Avatar
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    I'm adding the data Link Schematics. See attached.

    I have two questions:

    What is the Data Link Resistor?

    If a module, like the Body Control Module, is removed from the vehicle ... Is a Data Link Resistor still needed?

    dave w
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    Not to worry ... in a Hot Rod / custom application the E38 provides this to the CAN Bus network.

    As an example, you can bench read an E38 with tuning software, without issue.

    Try connecting to just a TCM (T42 / T43 / T76) without an ECM on the CAN Bus network - doesn't seem to work, does it ?

    Now, bridge the CAN Bus lines with a 120 ohm resistor, and try reading the TCM on its own again - son of gun, the tuning software will now read the TCM.

    The CAN Bus communications protocol requires 120 ohms resistance (a.k.a. - Data Link Resistor).

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