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Suburban keeps dying

Discussion in 'Chevy Suburban Forum (GMC Yukon XL)' started by Suburbanboi, May 22, 2013.

  1. Suburbanboi

    Suburbanboi New Member

    My suburban battery drained completely and a jump didn't work. So I got new battery and it was good. But 2 days later all electrical things are off. Help
  2. mwa3c

    mwa3c New Member

    Couple things. You could have an accessory light that is staying on, or an alternator that is not charging properly.
    1. Start the truck and drop a volt meter on the Battery leads. Should show 13 to 14.5 volts at idle.
    -If you do not show 13 to 14.5 volts, your alternator is not charging properly, or you have a bad ground.
    -If it does show proper voltage, move to steps 2 and 3.​

    1. Disconnect the accessory lights under the hood
    2. Remove the light bulb in the glove box (if there is one)

    If the alternator is not charging, the battery dies a slow non-charging death, and your electronics (radio, guage lightes, ect) will start to not power on or power off during a trip.

    If you have an accessory light staying on, if the truck is parked for a day or 2 without being started, that one light is enough to drain the battery down.

    Mark.

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