WARNING: This page is about a different car, the 2010 Cadillac SRX. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power & Ground Circuit Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Subsystem References Circuit Schematic (1 Of 3)
Courtesy of GENERAL MOTORS CORP.
Fig 3: Subsystem References Circuit Schematic (2 Of 3)
Courtesy of GENERAL MOTORS CORP.
Fig 4: Subsystem References Circuit Schematic (3 Of 3)