WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 Isuzu i-290, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Power, Ground, Serial Data, and Controlled/Monitored Subsystem References
Courtesy of GENERAL MOTORS CORP.
Fig 2: Subsystem References to Theft, Horn, Seat Belt, Outside Mirror, RAP, Brake Warning, ABS, and Wiper/Washer Systems
Courtesy of GENERAL MOTORS CORP.
Fig 3: Subsystem References to Interior Light and Interior Lights Dimming Systems