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How to Add a Second Battery to your Truck.

Discussion in 'GM Electrical Tech' started by Springthing, Mar 13, 2009.

  1. ChevyFan

    ChevyFan Administrator Staff Member 5+ Years 5000 Posts

    Great stuff guys. Love posts like this.
  2. PantheraUncia

    PantheraUncia Active Member 2 Years 1000 Posts

    I did a second battery upgrade to my 2000 Silverado, did not use the isolator, batteries are identical, but I am not loading the batteries "yet" to where it is a concern.
  3. Johnrockys

    Johnrockys New Member

    I don't have that little box in my truck I just did the the big 3 upgrade can't I just run a fuse holder from you to other instead
  4. Jim Marshall

    Jim Marshall New Member

    Does anyone have the photos to this thread? I would like to add a 2nd battery to my 99 suburban

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