My batterie died completely 3 weeks ago, I changed the batterie for a new one and when I cranked up my car my Odometer,trip odometer just went blank ---. I didn't had that problem before only when I installed new batterie any help????

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This happened 3 weeks ago at 71,000 miles on the car. It had the original batterie from AC Delco, it never showed the batterie light on my dashboard when I was heading out to work but when I was heading back home it was completely dead. No lights were left on I always make sure of that and I work at 4AM I would have seen lights one before leaving my car. When I went to purchase my batterie the car was left without its original batterie for about 2hrs tops. I installed the new one, crank it up and configured my stereo settings and head back home and realized my odometer and trip odometer was just blank ---. I contacted Chevy but they can't help, they can diagnose the problem for $115.00 plus if it's a software update which is ridiculous it be $50.00. Why would I pay so much for something simple I did? I never thought swapping batteries can remove my odometer. Hope you guys can help me out. Thanks