How do you replace the air conditioner belt on a 2000 gmc sierra?

1. Make sure that when you purchase a new belt, they don't try to sell you the full size serpentine belt.

2. There is a diagram of the belt routing on your truck when you lift the hood. Follow that.

3. Unfortunately, you need to remove the serpentine belt to replace the air conditioning belt.... the belt routing for the serpentine belt is also shown on the diagram.

4. To remove the serpentine belt, get a ratchet set, and crank the "self tensioning" assembly to release tension on the serpentine belt, and remove the belt.

5. There is another "self tensioning" assembly for the air conditioning belt. Crank to place the new AC belt on and release.

6. Re-install the serpentine belt.

This is an easy fix... it took me less than 20 minutes, I'm not a mechanic.