WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Ground, Power, References To DLC & Power Distribution Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: References To ABS, Brakes, Cruise Control, Horns, RAP, Rear Park Assist, Shift Lock, Stationary Windows & Wipers/Washer System Schematic