Just changed mine a few days ago. It's easier if you have someone to help. Toomy dad and I about 10 minutes once we figured out how to release the tension on the belt.
We used a 1/2" breaker bar. There is a female end on the tensioner, the male end of the breaker bar fits into the female end of the tensioner. Push the breaker bar clockwise until the tension loosens but while still holding down the tensioner you have to take the belt off. Once the belt is off the alternator pulley slowly release the tensioner. Replace the belt in the same position, there should be a sticker on the underside of your hood with the diagram. Finally, push the breaker bar again clockwise to release the tension and place the belt over the alternator pulley.
We used a 1/2" breaker bar. There is a female end on the tensioner, the male end of the breaker bar fits into the female end of the tensioner. Push the breaker bar clockwise until the tension loosens but while still holding down the tensioner you have to take the belt off. Once the belt is off the alternator pulley slowly release the tensioner. Replace the belt in the same position, there should be a sticker on the underside of your hood with the diagram. Finally, push the breaker bar again clockwise to release the tension and place the belt over the alternator pulley.
What they said. Just make sure you know how the belt goes back on before you take the old one off. There should be a diagram on a sticker somewhere under the hood. If not, you might want to make a little drawing to be sure.