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

Power, Ground, Serial Data and Audio Signal Communication


Object Number: 1326589  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Radio Antenna Module and Antennas
On Star (EU1)
Left Rear Fuse Block B+ Bus
Left Rear Fuse Block SEAT Circuit Breaker, TRUNK Fuse/Relay, AMP, AUDIO, DRIVER DR MOD and REAR DR MOD Fuses
Navigation Antenna, Radio, Audio Amplifier, VCIM and ISRVM
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Class 2 Serial Data Bus - LHD - 2 of 2
Entertainment Schematic Icons
Entertainment Schematic Icons
G104 - 1 of 2
Steering Wheel Controls - 2.6L/3.2L/3.6L (LY9/LA3/LY7)
Gages - 2.6L/3.2L/3.6L (LY9/LA3/LY7)
Navigation Antenna, Radio, Audio Amplifier, VCIM and ISRVM
On Star (EU1)
Figure 2:

Radio Antenna Module and Antennas


Object Number: 1326590  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Digital Radio Receiver (U2Y/U2X/U2K/U2L)
Power, Ground, Serial Data and Audio Signal Communication
Left Rear Fuse Block B+ Bus
Left Rear Fuse Block SEAT Circuit Breaker, TRUNK Fuse/Relay, AMP, AUDIO, DRIVER DR MOD and REAR DR MOD Fuses
Left Rear Fuse Block SEAT Circuit Breaker, TRUNK Fuse/Relay, AMP, AUDIO, DRIVER DR MOD and REAR DR MOD Fuses
Class 2 Serial Data Bus - LHD - 2 of 2
Keyless Entry
Traffic Information Receiver (Japan w/U2X/U2Y)
Tire Pressure Monitoring System
Figure 3:

Digital Radio Receiver (U2Y/U2K/U2L)


Object Number: 1326591  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speakers (U66)
Radio Antenna Module and Antennas
Left Rear Fuse Block B+ Bus
Left Rear Fuse Block SEAT Circuit Breaker, TRUNK Fuse/Relay, AMP, AUDIO, DRIVER DR MOD and REAR DR MOD Fuses
Class 2 Serial Data Bus - LHD - 2 of 2
Entertainment Schematic Icons
Entertainment Schematic Icons
Left Rear Fuse Block SEAT Circuit Breaker, TRUNK Fuse/Relay, AMP, AUDIO, DRIVER DR MOD and REAR DR MOD Fuses
Figure 4:

Speakers (U66)


Object Number: 1326593  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speakers (U57)
Digital Radio Receiver (U2Y/U2X/U2K/U2L)
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
Figure 5:

Speakers (U57)


Object Number: 1326594  Size: FS
Master Electrical Component List
Radio/Audio System Description and Operation
Speakers (U66)
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons
Entertainment Schematic Icons