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Old thread but new info. I was having electrical issues in my 2013 zl1 I bought a few months ago. Was told it could be battery, so I checked for date code on battery, but couldn’t find. Then learned that I had a factory issued battery. Installed in 12/12. It’s now 7/23 and just now starting to decline. Never seen a car battery to last 10.5 years. Switching battery didn’t fix my electric issue, so it may have even lasted longer.
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