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09 chevy express 4500 battery issue

Discussion in 'Medium-duty Truck Forum' started by chevymedic303, Dec 28, 2013.

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  1. chevymedic303

    chevymedic303 New Member

    Over the past Week I've been watching one of the 2 batteries overheat while the truck is off or running. Ive since turned the power inverter off And have been testing the batteries. Both batteries show good on a load tester and work as they should. The onboard inverter says they're showing low and charging in the low charge setting. off charge voltage is 14.1, on charge voltage is 14.2. Weird experience: I sat my tester electrodes down on the good battery(totally disconnected) after getting readings and the meter shows 5.6volts. what would cause this? I'm trying to diagnos the batteries. Any ideas.
  2. GM Customer Service

    GM Customer Service Rockstar 4 Years 500 Posts


    I understand that you are looking to resolve this vehicle issue yourself. I might not be able to give you any technical advice but I would like to look into this concern for you. Please private message me if I can assist you any further.


    Jennifer T.
    GM Customer Care

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