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

Theft Deterrent Control Module


Object Number: 765630  Size: LF
(1)Steering Wheel Position Sensor
(2)Theft Deterrent Control Module
Figure 2:

Theft Deterrent Exciter Module


Object Number: 766231  Size: LF
(1)Theft Deterrent Exciter Module