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

Radio Power, Ground, Front Speakers, Antenna and References


Object Number: 1638473  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Rear Speakers w/o UK6, U32, or U2K
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
Low Speed Serial Data
Steering Wheel Control Schematics
OnStar Schematics
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Headlights/Daytime Running Lights (DRL) Schematics
Figure 2:

Rear Speakers w/o UK6, U32 or U2K


Object Number: 1638475  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Rear Seat Audio (RSA) Controller
Radio Power, Ground, Front Speakers, Antenna and References
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Figure 3:

Rear Seat Audio (RSA) Controller


Object Number: 1638476  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
DVD Player and Digital Radio Receiver
Rear Speakers w/o UK6, U32, or U2K
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Displays
Park Lamps
G304 and G305
Figure 4:

DVD Player and Digital Radio Receiver


Object Number: 1638479  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Rear Seat Audio (RSA) Controller
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Underhood Fuse Block - RBEC 1 Fuse, Rear Fuse Block, AUX PWR #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Underhood Fuse Block - RBEC 1 Fuse, Rear Fuse Block, AUX PWR #2, BCK/UP LAMPS, CIG/AUX, HTD MIR, HTD SEAT, RKE/XM/DVD/UGD, RR DEFOG and S/ROOF Fuses
Low Speed Serial Data
G304 and G305
Figure 5:

Redundant Radio Controls - 3 Spoke


Object Number: 1709409  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Redundant Radio Controls - 4 Spoke
DVD Player and Digital Radio Receiver
Entertainment Schematic Icons
Figure 6:

Redundant Radio Controls - 4 Spoke


Object Number: 1709410  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Control Module References
Redundant Radio Controls - 3 Spoke
Entertainment Schematic Icons