How do you change the alternator in a 99 Bonneville?

To change the alternator in a 1999 Pontiac Bonneville, first disconnect the negative battery cable to prevent electrical shock. Remove the serpentine belt by loosening the tensioner, then disconnect the electrical connections from the alternator. Unbolt the alternator from its mounting bracket and carefully remove it from the engine bay. Install the new alternator by reversing the removal steps, ensuring all connections are secure before reconnecting the battery.