GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Pontiac 🢒 2009 🢒 G8 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Body Control System Schematics
Figure 1:

Module Power, Ground, Serial Data, and Transmission Subsystem References
Object Number: 2034122 Size: FS
Figure 2:

Cruise Control, Exterior Lights, Interior Lights, Horn, Door Lock, Release System, Hydraulic Brakes, and Antilock Brake Subsystem References
Object Number: 2074590 Size: FS
Figure 3:

Headlight, Wiper/Washer, Fog Light, Exterior Lights, and Starting and Charging Subsystem References
Object Number: 2074594 Size: FS
Figure 4:

Instrument Cluster, Door Lock, Heated/Cooled Seat, Immobilizer, and Power Moding Subsystem References
Object Number: 2074596 Size: FS