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

Passenger Compartment, in the Steering Column


Object Number: 476232  Size: LF
(1)Steering Column
(2)Theft Deterrent Control Module
Figure 2:

Rear Integration Module (RIM)


Object Number: 492170  Size: MF
(1)Rear Integration Module (RIM) C1
(2)Rear Integration Module (RIM) C2