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Sounds similar to what mine reads. Needs to charge the battery so the 14.6 seems normal. It should back down in voltage after you've been running the car for a while. It'll pop back to 14.6 the next time you start the car.
I have a 2014 Z51, the voltmeter reads just below 13. It was reading 14.6, is there something wrong. Thanks JJJ
Normal, for a good battery, voltage is only what is needed to increase amps to charge the battery, once charged don't want it to overcharge so voltage drops.