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

Vehicle Theft Deterrent (VTD) System


Object Number: 808771  Size: FS
Master Electrical Component List
Theft Systems Description and Operation
CTD Inputs and Outputs
ALDL, PCM BATT, IP Fuses
RR BLO, RR DR MDL, HVAC, Stop LP, IGN SW, and TSIG/HAZ Fuses
Ignition Switch
Ignition Switch
G201 1 of 3
G201 1 of 3
Class 2 Serial Data (3 of 3)
Figure 2:

Content Theft Deterrent (CTD) System Inputs and Outputs


Object Number: 808773  Size: FS
Master Electrical Component List
Theft Systems Description and Operation
CTD Door Inputs
VTD System
Turn/Hazard Flasher Module, Hazard Switch
02 Ksp Horns
Class 2 Serial Data (2 of 3)
Class 2 Serial Data (3 of 3)
Rear Compartment Lid Ajar Signal
Door Opens Inputs (w/B9Q)
Class 2 Serial Data (1 of 3)
G402 2 of 2
G402 2 of 2
G104
G104
Figure 3:

Content Theft Deterrent (CTD) System Door Inputs


Object Number: 808775  Size: FS
Master Electrical Component List
Theft Systems Description and Operation
CTD Inputs and Outputs
Door Open Inputs
Driver Door Power Door Lock
Class 2 Serial Data (3 of 3)
Class 2 Serial Data (2 of 3)
Door Opens Input (w/ V4U)
Door Opens Input (w/ V4U)
Door Opens Input (w/ V4U)
Door Opens Input (w/ V4U)