How do you change alternator on a 98 Lexus gs300?

To change the alternator on a 1998 Lexus GS300, first disconnect the negative battery terminal to ensure safety. Remove the serpentine belt by loosening the tensioner, then unbolt the alternator from its bracket. Disconnect the electrical connectors and remove the old alternator. Install the new alternator by reversing the steps—attach it to the bracket, reconnect the electrical connections, and reinstall the serpentine belt before securing the battery terminal.