My odometer is reading "------ mi".

What is your question?

After disconnecting and reconnecting the battery, my odometer reads "------ mi". Everything works, and using an OBD-II reader, the BCM knows how many miles are on the car and continues to track the mileage. There are no error codes.

What makes this problem better or worse?

I have tried disconnecting the battery again to no avail.

How long has your 2014 Buick Verano had this problem?

2 weeks