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2017 Cadillac XTS - Won't start after new battery

My old battery died so I installed a new battery in my 2017 Cadillac XTS. Although my lights and radio comes on, the car won’t start. The vehicle does not turn over or any sound from the engine, What could possibly be wrong with it.

https://www.aa1car.com/library/battery_disconnect_problems.htm

Tester

You could possibly have a new battery that is not fully charged or lost some of its charges. Take it back and have it checked.