How do you change alternator on 2000 Cadillac sedan deville?

To change the alternator on a 2000 Cadillac Sedan DeVille, first disconnect the negative battery cable to ensure safety. Remove the serpentine belt by loosening the tensioner, then unbolt the alternator from its mounting bracket. Disconnect the electrical connectors and remove the alternator. Install the new alternator by reversing these steps, ensuring all connections are secure and the belt is properly tensioned before reconnecting the battery.