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

Data Link Connector (DLC)


Object Number: 1820943  Size: FS
Master Electrical Component List
Control Module References
RHD High Speed LAN
Ground Distribution G201
Figure 2:

RHD High Speed LAN


Object Number: 1821015  Size: FS
Master Electrical Component List
Control Module References
LHD High Speed LAN
Data Link Connector (DLC)
Figure 3:

LHD High Speed LAN


Object Number: 1821017  Size: FS
Master Electrical Component List
Control Module References
RHD High Speed LAN