GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power, Ground, Serial Data and Antenna - Base


Object Number: 1223769  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speaker Outputs - Base
B+ Bus - Fuse Block Rear
Data Link Connector
G103, G104
Figure 2:

Speaker Outputs - Base


Object Number: 1223797  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Power, Ground, Serial Data, Antenna and Low Level Audio Signals - Premium
Power, Ground, Serial Data and Antenna - Base
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 3:

Power, Ground, Serial Data, Antenna and Low Level Audio Signals - Premium


Object Number: 1223814  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speaker Output, Noise Compensation Microphone
Speaker Outputs - Base
B+ Bus - Fuse Block Rear
Entertainment Schematic Icons
Entertainment Schematic Icons
G103, G104
Data Link Connector
Figure 4:

Speaker Outputs, Noise Compensation Microphone - Premium


Object Number: 1223825  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Power, Ground, Serial Data, Antenna and Low Level Audio Signals - Premium
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Data Link Connector