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

Body Control Module Connectors


Object Number: 537288  Size: LF
(1)Body Control Module (BCM)
(2)Body Control Module Connector C1
(3)Body Control Module Connector C2
(4)Body Control Module Connector C3
Figure 2:

Instrument Cluster Wiring


Object Number: 582011  Size: LF
(1)Body Control Module (BCM)
(1)Body Control Module (BCM)
(2)HVAC Control Module
(3)S219
(4)S217
(5)S211
(6)S257
(7)S213
(8)Headlamp and Panel Dimmer Switch
(9)S256
(10) Headlamp and Panel Dimmer Switch Connector
(11)Remote Control Door Lock Receiver (RCDLR)
(12)S210
(13)S254
(14)S209
(15)S255
(16)S212
(17)S218
(18)S221
(19)Instrument Cluster Connector
(20)S258
(21)S222
(22)S225
(23)Radio Connectors
(24)Body Control Module (BCM) Connectors