Question about 2001 GMC Yukon

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How do you know if you have a 105 or 130 amp alternator ? Trying to change the belt .

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  • boelives999
    boelives999 May 23, 2012

    Measure across the face of the alternator. If it measure 5 3/4 inches, then it is a 130 amp alternator.

  • boelives999
    boelives999 May 23, 2012

    Measure across the face of the alternator. If it measure 5 3/4 inches, then it is a 130 amp alternator.


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The best way to is call a gmc dealer and give them the last 8 digits of your vin they will tell you. Sometimes you can use the 8th digit of your vin at a parts store (Auto Zone). Hope this helps

Posted on Sep 27, 2009

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