WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Right Front Floor, Right Rear Wheelhouse, and Roof Provisions Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Front and Rear Lamps Provisions, SEO Relays Schematic