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alternator amp rateing help

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by joe daddy, Sep 22, 2013.

  1. joe daddy

    joe daddy New Member

    i have a 2004 Silverado z71 4x4 with the 5.3 i wanted to ask how do you tell what alternator belongs with the truck, as far as what amp it is 105/145amp??
    i need a new belt for it and belt tensioner soon, the alternator on it now has the wrong grooved pulley for it so i need a new pulley for it as well.
    can anyone help me????
  2. RayVoy

    RayVoy Well-Known Member 2 Years 1000 Posts

  3. joe daddy

    joe daddy New Member

    i bought the truck used, the speedo cluster was going bad so they thought it was a bad alternator and battery. when it wasnt either one. i noticed it had a 5 groove pulley on it instead of a 6 groove, so i figured they got the wrong alternator??? thank you for the link.

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