Senor Moore

My 2017 silverado does the same. The only thing different is yesterday i got a " check charging system." message after auto starting the truck and I got in, put the key in and turned it to the starting position. I ran an errand turned the car off inspected battery and alternator conmections. I started the truck and other than the exact fluctuation in the meter like the pic you posted I havent received any message today. Im going to obey my truck and have it checked today though lol and I'll post back. I like the plugin volt meter you have.