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

Content Theft Deterrent


Object Number: 1907318  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Control Module References
SPO Alarm
Door Jamb Switches
Door Jamb Switches
Data Communication Schematics
Horn Schematics
Park Lamp Controls and Front Park Lamps
Low Beam and Daytime Running Lamps - X88 or Z88
Door Jamb Switches
Figure 2:

SPO Alarm


Object Number: 1907328  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Control Module References
Content Theft Deterrent
AIRBAG, SEO B1, and SEO B2 Fuses