What can drain the battery in my 09impala overnight

Asked by charlotte Feb 28, 2023 at 11:00 PM about the 2009 Chevrolet Impala

Question type: Maintenance & Repair

Brand new battery dead in one night

3 Answers
310,265

Gene answered about a year ago

Most common is a bad alternator, it may check good but if the diodes are bad it can pull out power as well as make it. Computer controlled charging systems make it difficult for most parts stores cause they can’t check it right, so find a good independent shop that knows how to check the entire system. Won’t be the first time a computer has caused a battery drain problem.

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beatupchevy answered about a year ago

You have a serious power drain , I guess the good part is being so bad it could be easier to find

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