WARNING: This page is about a different car, the 2006 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: DLC, Ground and Power - Wiring Diagram
Courtesy of GENERAL MOTORS CORP.
Fig 2: Lighting References (1 of 2) - Wiring Diagram
Courtesy of GENERAL MOTORS CORP.
Fig 3: Lighting References (2 of 2) - Wiring Diagram
Courtesy of GENERAL MOTORS CORP.
Fig 4: Subsystem References (1 of 2) - Wiring Diagram
Courtesy of GENERAL MOTORS CORP.
Fig 5: Subsystem References (2 of 2) - Wiring Diagram