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

BCM Power, Ground, and Serial Data


Object Number: 2063391  Size: FS
Figure 2:

BCM Inputs and Outputs 1 of 4


Object Number: 2063393  Size: FS
Figure 3:

BCM Inputs and Outputs 2 of 4


Object Number: 2063395  Size: FS
Figure 4:

BCM Inputs and Outputs 3 of 4


Object Number: 2063397  Size: FS
Figure 5:

BCM Inputs and Outputs 4 of 4


Object Number: 2063399  Size: FS
Figure 6:

Rear Body Control Module References (EXP with UTA/UTC)


Object Number: 2063403  Size: FS