I have a 2020 Chevy Silverado 2500HD diesel. I’ve had it a month. It’s almost to 2000 miles. I drove it Saturday with no issues. Stayed home Sunday. And today, Monday it’s completely dead. I have 2 batteries, husband said both are dead. Nothing was left on, no doors left open, nothing out of the usual. Why would two brand new batteries be dead for no reason?? Dealer is closed, will call them in the morning.