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

Content Theft Deterrent


Object Number: 1916817  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Control Module References
SPO Theft
Figure 2:

SPO Theft


Object Number: 1916819  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Control Module References
Content Theft Deterrent