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  1. #1

    Default question about fuse block

    i have been looking everything over in my truck because i am planning a trip so while i was checking fuse's and such i had out the chilton just making sure the correct fuse is where they are supposed to be when i got to wondering what are the aux a and aux b hooked up to? the chilton doesn't even mention them any ideas? beacuse they are supposed to have 30 fuse's in them but aux b has a 20

  2. #2


    Aux A and Aux B are auxilary battery power hook-ups. On mine, Aux A feeds my e-lights, Aux B feeds the trailer brake.

    Look at your diagram - the posts above the fuses you circled are the corresponding outputs. (toward the firewall when you look in the truck) These give you a good solid connection for bigger power draw equipment.

    Hopes this helps,

    1999 Chevy K2500 Suburban 350
    K&N, reworked cai, Thrush cat-backs
    Vinyl, cranks, floor shift, and rear air!

  3. #3


    ah i see so this would probably be the towing power line then? i do have a tow hitch under the truck never used it though, good to know just in case i do tow though thanxs for the help

  4. #4


    what year, and model... you may want to add that to your signature for future reference...
    2003 K2500 Sububan 6.0L w/Quadrasteer
    190,000 + miles


  5. #5


    ah soory bout that
    95 k2500 sle gmc

  6. #6

    Join Date
    Aug 2008
    East of Branson, Missouri
    Blog Entries


    I just added some lights to my Suburban and used both of those Aux spots. Seems to be working fine - go nuts!

    "The Sarge"
    1999 Chevy Suburban LT- K2500
    7.4 454 Vortec, 4WD
    305/70/16 on Eagle Alloy

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