How do you change an alternator belt on a 1999 Mitsubishi eclipse gt?

To change the alternator belt on a 1999 Mitsubishi Eclipse GT, first, disconnect the negative battery terminal for safety. Loosen the alternator mounting bolts and the tensioner bolt to relieve tension on the old belt. Remove the old belt and install the new one, ensuring it follows the correct routing. Finally, adjust the tension on the alternator and tighten all bolts before reconnecting the battery.