WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Dome Lamp Bulb Locations
Courtesy of GENERAL MOTORS CORP.
Install the bulbs (1,2,3).
Fig 2: Identifying Points For Inserting Flat-Bladed Tool Between Lens & Headliner