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

Lower Left of the I/P


Object Number: 1460019  Size: MF
(1)Steering Column
(2)Vehicle Communication Interface Module (VCIM)
Figure 2:

Mobile Telephone, Navigation and Inside Rearview Mirror Harness


Object Number: 883904  Size: MF
(1)Inside Rearview Mirror Connector (DF5/UE1)
(2)Navigation Antenna Connector (UE1)
(3)Cellular Antenna Connector (UE1)
(4)Cellular Telephone Microphone Connector (UE1)
(5)C225 (DF5/UE1)