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

I/P Harness Routing - Left Side of the I/P


Object Number: 883616  Size: MF
(1)C221
(2)Data Link Connector (DLC)
(3)Stop Lamp Switch Connector
Figure 2:

Right Side of the I/P


Object Number: 1208924  Size: MF
(1)Body Control Module (BCM)