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Radio/Navigation System Schematics

Fig 1: Power, Ground, Serial Data, Antenna & Front Speaker Outputs Circuit Schematic
GM2248383Courtesy of GENERAL MOTORS CORP.
Fig 2: Rear Speaker Outputs Circuit Schematic
GM2248387Courtesy of GENERAL MOTORS CORP.
Fig 3: Steering Wheel Radio Redundant Controls Circuit Schematic
GM2248389Courtesy of GENERAL MOTORS CORP.