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

Power, Ground, and Serial Data


Object Number: 1907352  Size: FS
Master Electrical Component List
Control Module References
Speakers
Figure 2:

Speakers


Object Number: 1907484  Size: FS
Master Electrical Component List
Control Module References
Digital Radio (U2K)
Power, Ground, and Serial Data
Figure 3:

Digital Radio (U2K)


Object Number: 1907358  Size: FS
Master Electrical Component List
Control Module References
Speakers