Battery low issue

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Jun 28, 2019
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Minneapolis, MN

I just got a 2020 Tahoe from CarMax a few weeks ago. I just got it back on Saturday from the dealer, where I had them do a complete look-over, 36k mile service, new tires, etc. I went to start it yesterday and it wouldn’t start. I got a “battery low” message on the instrument panel. I put a meter on the battery and it only showed 7.68 volts. I ended up jumping it and put the charger on overnight. They did a battery check during the service and it checked out ok. Needless to say, it was disconcerting to see this happen.

Would anyone have and ideas how this happened? If something was inadvertently left on, wouldn’t there be an auto-shutoff feature to prevent situations like this? They replaced the tires because, although plenty of tread, there was a lot of cracking, indicating the car may have been standing for a period during the lockdowns. Could that have damaged the battery? Being a 2020 it could possibly have been original battery. The car has 37k miles.

Any ideas???

Thanks for any help!

You don't state your geographic location, but here in Minnesota I've nothing but headaches with my battery going dead in colder weather. The cause? The passive entry buttons on the door handles collect moisture from either rain (on a warmer day) or the car wash. Then it gets cold and the passive button sticks "in" when depressed to enter. I'm going to replace the buttons when I get around to it, but in the meantime I need to remember to use the FOB to unlock the doors (when it's cold out).

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