need help

Discussion in 'Other Rides' started by JackB, Oct 24, 2013.

  1. JackB

    JackB New Member

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    Location:
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    I have a 1994 GMC Topkick with a 6.6 Cat. my tach does not work. I need the wire color out the inst. panel and the pin location of the plug if possible
     

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