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

Power, Ground, Serial Data, and Steering Wheel Controls


Object Number: 1807096  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Radio/Audio Outputs and VSS Input
OnStar Schematics
Entertainment/Communication Schematic Icons
Power, Ground, DLC and Splice Pack SP205
B+ Bus
AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses
SP206 and SP207
G200
G200
G200
Entertainment/Communication Schematic Icons
Power, Ground, DLC and Splice Pack SP205
Figure 2:

Radio Audio Outputs and VSS Input


Object Number: 1807100  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Front Speakers
Power, Ground, Serial Data, and Steering Wheel Controls
Gages
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Figure 3:

Front Speakers


Object Number: 1807102  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Rear Door Speakers and Subwoofer
Radio/Audio Outputs and VSS Input
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Figure 4:

Rear Door Speakers and Subwoofer


Object Number: 1807106  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio Receiver (U2K)
Front Speakers
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Figure 5:

Digital Radio Receiver (U2K)


Object Number: 1807109  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Navigation System
Rear Door Speakers and Subwoofer
B+ Bus
AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses
SP206 and SP207
G200
Figure 6:

Navigation Radio


Object Number: 1807113  Size: FS
Master Electrical Component List
Navigation System Description and Operation
Control Module References
Digital Radio Receiver (U2K)
B+ Bus
AUX PWR, CIG LTR, RADIO, RADIO AMP, and SUNROOF Fuses
Power, Ground, DLC and Splice Pack SP205
G200