How do you change an alternator on a 2001 suburban?

To change the alternator on a 2001 Suburban, first, disconnect the negative battery terminal to ensure safety. Remove the serpentine belt by loosening the tensioner, then detach the electrical connections from the alternator. Unbolt the alternator from its mounting bracket and replace it with the new unit, securing it in place. Finally, reconnect the electrical connections, reinstall the serpentine belt, and reconnect the battery terminal.