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

Base Radio


Object Number: 1830131  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Uplevel Radio - 1 of 2
BCM Fuse (Underhood Fuse Block), DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, and SDM Fuses, DOOR LOCK PCB , DOOR UNLOCK PCB, DR DOOR UNLOCK PCB, INADVERTENT LOAD CONTROL PCB, and RAP Relays (BCM)
Low Speed LAN
Audio Output
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
G301, G302, G303, G400 and G402
Figure 2:

Uplevel Radio 1 of 2


Object Number: 1830134  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Uplevel Radio - 2 of 2
Base Radio
BCM 2 and BCM 3 Fuses (Underhood Fuse Block), AMP, CLSTR, HVAC/PK3+, and IGN SW/PK3+ Fuses, HVAC Relay (Body Control Module (BCM))
BCM Fuse (Underhood Fuse Block), DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, and SDM Fuses, DOOR LOCK PCB , DOOR UNLOCK PCB, DR DOOR UNLOCK PCB, INADVERTENT LOAD CONTROL PCB, and RAP Relays (BCM)
Low Speed LAN
Audio Output
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
G301, G302, G303, G400 and G402
G301, G302, G303, G400 and G402
Figure 3:

Uplevel Radio 2 of 2


Object Number: 1830136  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio
Uplevel Radio - 1 of 2
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Figure 4:

Satellite Radio


Object Number: 1830138  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Redundant Steering Wheel Controls
Uplevel Radio - 2 of 2
ABS, MIR, and S BAND ONSTAR/RKE Fuses and PWR SEATS Circuit Breaker (Underhood Fuse Block)
B+ Bus Bar - 2 of 2
Low Speed LAN
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
G301, G302, G303, G400 and G402
Figure 5:

Redundant Steering Wheel Controls


Object Number: 1830140  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio
SIR Schematic Icons
Figure 1:

Uplevel Radio 1 of 2


Object Number: 1871239  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Uplevel Radio - 2 of 2
Base Radio
HVAC/PK3, AUDIO AMPLIFIER, WIPERS, HVAC/IP IGN, RESRAINTS, and EPS/SWC Fuses
WINDOWS, DOOR LKS, INT LPS, ECM/TCM, RADIO, and SDM Fuses
Data Communication Schematics
G301, G102, G303, and G402
G301, G102, G303, and G402
Figure 2:

Uplevel Radio 2 of 2


Object Number: 1871241  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio
Uplevel Radio - 1 of 2
Figure 3:

Redundant Steering Wheel Controls


Object Number: 1871246  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio
Entertainment/Communication Schematic Icons