WARNING: This page is about a different car, the 2003 Pontiac Montana, 2003 Oldsmobile Silhouette, and 2003 Chevrolet Venture. However, it is still accessible from the selected car via links, so may be relevant.
Rotate the drive belt tensioner in order to release the tension on the drive belt.
Remove the drive belt.
Fig 1: Releasing Tension On Drive Belt By Rotating Drive Belt Tensioner