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Thread: Electrical gremlin in my 2007 GMT900

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  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Seriously? I didn't get the text for some reason.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Aug 2008
    Location
    North Texas
    Posts
    12,078
    Explained via text today.

    For those with this type issue on an '07 or '08 GMT900 do this.

    Disable fuel injectors
    Attach one Fluke lead to the negative battery cable at the battery and one to the negative battery cable at the RH head.
    Set the Fluke for DC voltage and use the min/max (record) function.
    Crank the engine for about 10 seconds.
    Review the MAX reading on the Fluke.

    If it's more than 200 mV, replace the cable. New (good) cables test about 100-120 mV.

    It's not common and there is no recall. I have fixed four or five trucks with off the wall electrical issues with this test. There is a bulletin. It might apply to 2009+ but I have only seen earlier builds of the GMT900 with the issue.

    HTH all

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