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

Radio Power and Grounds


Object Number: 661293  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Amplifier and Remote CD Changer Power and Grounds
Rear Fuse Block- RDO and CD/PH Fuses
Right Underhood Fuse Block- PWR WDO Circuit Breaker/Rear Fuse Block-RDO/PH, SUNRF Fuses and RAP Relay
VF Dimming and Control
Steering Wheel Controls Schematics
G202 (1 of 4)
G202 (3 of 4)
Figure 2:

Amplifier and Remote CD Changer Power and Grounds


Object Number: 661295  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Radio Speaker Outputs (UW6)
Radio Power and Grounds
Rear Fuse Block- RDO and CD/PH Fuses
Power and Ground
Power, Ground and Serial Data Lines
Entertainment Schematic Icons
VIU Output Signals
VIU Output Signals
Power, Ground and Serial Data Lines
Entertainment Schematic Icons
G202 (3 of 4)
G202 (3 of 4)
G202 (1 of 4)
Figure 3:

Radio Speaker Outputs (UW6)


Object Number: 661296  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Radio Outputs (U99)
Amplifier and Remote CD Changer Power and Grounds
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 4:

Radio Outputs (U99)


Object Number: 661297  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Amplifier Door Speaker Outputs (U99)
Radio Speaker Outputs (UW6)
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 5:

Amplifier Door Speaker Outputs (U99)


Object Number: 661298  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Amplifier Speaker Output (U99)
Radio Outputs (U99)
Figure 6:

Amplifier Speaker Output (U99)


Object Number: 661299  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Antenna Module
Amplifier Door Speaker Outputs (U99)
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 7:

Antenna Module


Object Number: 661300  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Amplifier Speaker Output (U99)
Defogger Schematics