WARNING: This page is about a different car, the 2007 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground And Serial Data - Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Controlled/Monitored Subsystem References 1 Of 4 - Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: Controlled/Monitored Subsystem References 2 Of 4 - Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: Controlled/Monitored Subsystem References 3 Of 4 - Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 5: Controlled/Monitored Subsystem References 4 Of 4 - Schematic