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

Power, Ground, and References


Object Number: 1647561  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Radio to Speakers (UW6)
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses AND PKLP RELAY
L26/L32
LS4
OnStar Schematics
Navigation System Schematics
G202
G202
Figure 2:

Radio to Speakers - UW6


Object Number: 1647562  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Audio Signal Communication (U87/U88)
Power, Ground and References
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 3:

Audio Signal Communication (U87/U88)


Object Number: 1647564  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Speakers- Front (U87/U88)
Radio to Speakers (UW6)
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 4:

Speakers - Front (U87/U88)


Object Number: 1647565  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Speakers - Rear (U87/U88)
Audio Signal Communication (U87/U88)
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 5:

Speakers - Rear (U87/U88)


Object Number: 1647566  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Satellite Radio (U2K)
Speakers- Front (U87/U88)
Figure 6:

Satellite Radio - U2K


Object Number: 1647567  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Steering Wheel Controls
Speakers - Rear (U87/U88)
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses AND PKLP RELAY
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses AND PKLP RELAY
BATT MAIN 1, PK LAMPS, DISPLAS, CHMSL/BKUP, INT LIGHT, RFA MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, CANISTER Fuses AND PKLP RELAY
L26/L32
LS4
G202
Figure 7:
Object Number: 1654830  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Satellite Radio (U2K)
Entertainment Schematic Icons