April 5, 2026: LEMON Manuals is launched! Read the announcement.

Data Communication Wiring Schematics

Fig 1: Power, Ground, and Low Speed GMLAN Serial Data Wiring Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 2: High Speed GMLAN Serial Data Wiring Schematic

Courtesy of GENERAL MOTORS CORP.

Fig 3: CAN Bus Serial Data (JL4) Wiring Schematic

Courtesy of GENERAL MOTORS CORP.