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

PWR and Front Speakers


Object Number: 791269  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Rear Speakers
Ignition A, Ignition B Fuses, and Ignition Switch
Lighting and Battery Fuses
Radio 1, Wiper, Transmission, and Crank Fuses
Stop, Power Auxiliary, Cigar Lighter, and Radio B Fuses
Illumination Fuse and Headlamp Switch
Figure 2:

Rear Speakers


Object Number: 791270  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Rear Speakers with Upfitter Provisions
PWR and Front Speakers
Headlamp Switch, Instrument Cluster, Park/Neutral Position Switch
Data Link Connector (DLC)
Components through S202 and S205 to G201
G201
Figure 3:

Rear Speakers with Upfitter Provisions


Object Number: 791271  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Radio Power, Grounding, and DLC with Y91
Rear Speakers
Headlamp Switch, Instrument Cluster, Park/Neutral Position Switch
Figure 4:

Radio Power, Grounding, and DLC with Y91


Object Number: 791272  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Amplifier Power and Grounding
Rear Speakers with Upfitter Provisions
Radio 1, Wiper, Transmission, and Crank Fuses
Ignition A, Ignition B Fuses, and Ignition Switch
Lighting and Battery Fuses
Components through S202 and S205 to G201
Components through S202 and S205 to G201
G201
Data Link Connector (DLC)
Figure 5:

Amplifier Power and Grounding


Object Number: 791274  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
RSA Power and Control Circuits
Radio Power, Grounding, and DLC with Y91
G302, G303 and G304
G106 with Y91
Figure 6:

RSA Power and Control Circuits


Object Number: 791275  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers
Amplifier Power and Grounding
Figure 7:

Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers


Object Number: 791276  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Rear Speakers and Subwoofer, Rear Amplifiers
RSA Power and Control Circuits
Rear Speakers and Subwoofer, Rear Amplifiers
G302, G303 and G304
G302, G303 and G304
G302, G303 and G304
G302, G303 and G304
Figure 8:

Rear Speakers and Subwoofer, Rear Amplifiers


Object Number: 791277  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Rear Channel Audio Inputs and Output
Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers
G302, G303 and G304
Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers
Figure 9:

Rear Channel Audio Inputs and Output


Object Number: 791281  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Auxiliary and VCP Audio
Rear Speakers and Subwoofer, Rear Amplifiers
Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers
Front Speakers and Subwoofer, B-Pillar Speakers, and Amplifiers
Auxiliary and VCP Audio
Figure 10:

Auxiliary and VCP Audio


Object Number: 791284  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation Class 2 Radio
Rear Channel Audio Inputs and Output