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: Body Control System - Grounds, Power and Keyless Entry Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Body Control System - ABS, Audible Warnings, Body Rear End, Horns, HVAC, Hydraulic Brakes, I/P, RAP, Shift Lock and Theft Deterrent Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Body Control System - Lighting
Courtesy of GENERAL MOTORS CORP.
Fig 4: Body Control System - Doors, Engine Electrical, and Lighting Schematic