WARNING: This page is about a different car, the 2003 GMC Safari and 2003 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
Remove the screws that retain the door frame garnish molding to the vehicle.
Remove the door frame garnish molding.
Disconnect the electrical connector.
Fig 1: Removing Door Frame Garnish Molding - Rear Upper