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

Radio (UQ4)


Object Number: 1785375  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Power, Ground, Communication (UQ3)
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
Power, Ground, Low Speed GMLAN
Onstar Schematics
G201 (1 of 2)
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
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 2:

Power, Ground, Commuincation (UQ3)


Object Number: 1785377  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Amplifier, Speakers
Radio (UQ4)
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
BCM Fuses - DR LCK, ECM/TCM, INT LIGHT, PWR WNDW, RDO, SDM, S ROOF
Power, Ground, Low Speed GMLAN
Onstar Schematics
G201 (1 of 2)
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
Figure 3:

Amplifier, Speakers (UQ3)


Object Number: 1785383  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio Receiver (U2K)
Power, Ground, Communication (UQ3)
Body Control Module - AUDIO AMPLIFIER Fuse, BCM2 Fuse, CLUSTER Fuse, IGN SW Fuse, STOP LPS Fuse
G201 (1 of 2)
Entertainment/Communication Schematic Icons
Entertainment/Communication Schematic Icons
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:

Digital Radio Receiver (U2K)


Object Number: 1785385  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Redundant Radio Controls
Amplifier, Speakers
Underhood Fuse Block Fuses- ABS, ABS2, BCK UP, CNSTR VENT, ECM/TRANS, EPS, HTD SEATS, IP IGN, LTR, MIR, PRK/NEUT, S-BAND/ONSTAR, and RUN/CRANK Relay
Underhood Fuse Block Fuses- ABS, ABS2, BCK UP, CNSTR VENT, ECM/TRANS, EPS, HTD SEATS, IP IGN, LTR, MIR, PRK/NEUT, S-BAND/ONSTAR, and RUN/CRANK Relay
Power, Ground, Low Speed GMLAN
G401
Figure 5:

Redundant Radio Controls


Object Number: 1785386  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Digital Radio Receiver (U2K)
Entertainment/Communication Schematic Icons