July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!
Data Communication Wiring Schematics
WARNING: This page is about a different car, the 2011 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Low Speed GMLAN Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 2: Mid Speed GMLAN Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 3: High Speed GMLAN (1 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 4: High Speed GMLAN (2 of 2) Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 5: High Speed GMLAN CE Bus Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 6: Communications Enable Wiring Schematic
Courtesy of GENERAL MOTORS CORP.
Fig 7: Local Interconnect Network Wiring Schematic