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

Left Side of the I/P


Object Number: 1628999  Size: MF
(1)Splice Pack SP200
(2)I/P Harness
(3)Data Link Connector (DLC)
Figure 2:

Center of the I/P


Object Number: 1454882  Size: MF
(1)Body Control Module (BCM)
(2)I/P Harness
(3)Center I/P Support