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  1. #1

    Default 2004 Yukon Alternator / Serpentine Belt Question

    Earlier today, I went to the autoparts store to pick-up a new water pump, serpentine belt, hoses etc for my 2004 Yukon XL 1500 and was asked the size of of my alternator (in AMPS) for selecting the correct belt (which I did not know), so can anyone advise on how to tell the differences between the alternators (105 AMPS vs 140 AMPS) and/or advise of the differences it would make to the serpentine belt I should select, obviously I would like to get a new correct belt since I will need to remove it for the Water Pump replacement. Appreciate any advice. Thanks

  2. #2


    Welcome to GMTC,

    Check your glove box for these codes.
    8A7, KG8 - 130 amp
    8A3, KW2 - 124 amp
    8A5, 8C0, K98, KG9 - 140 amp
    8C6, KG3 - 145 amp
    8C7, KG4, KG5 - 150 amp
    8W5, 8X5, K61, K62, K65 - 105 amp
    8Z3, 8Z4, K60 - 100 amp
    K09 - 120 amp
    K63 - 110 amp
    KG7 - 125 amp
    KW1 - 160 amp
    KW3 - 135 amp
    KW7 - 170 amp
    KW9 - 190 amp
    KYU - 200 amp

    I don't know if it matters on the 2004, but on my 2005 there were to styles (a Bosch and a Delco/Delphi) They are not interchangeable.

    1995 Silverado 4x4
    6" BDS Suspension Lift-3" Body Lift-Add A Leaf in rear -Trailmaster SSV Shocks-Duel Steering Stabilizer Kit -AirAid Cold air intake-
    4.56 Gears with Detroit Auburn Locker-Pro-Comp Traction Bars with duel shocks-Aluminum Skid Plate Kit-38.5" x 16.5" Mickey Thompson Baja Claws-Constant Dropping fuel gauge

    2005 Yukon XL Jet Power Programmer, Bilstein Shocks, Bilstein rear springs, Helwig Anti-sway bars, EGR Window Visors, EGR Hood Shield, Denali Headlights, Headlight harness upgrade, GE NightHawk Bulbs, White Night Rear lighting system, Russell Braided SS brake lines, PowerStop Brake pads, PowerStop cross drilled and Slotted Rotors,
    2002 Silverado ext cab 2wd (Sold)
    2003 Yukon XL (Totaled)

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