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

Vehicle Theft Deterrent (VTD) System


Object Number: 1412154  Size: FS
Master Electrical Component List
Vehicle Theft Deterrent (VTD) Description and Operation
Content Theft Deterrent (CTD) System Inputs and Outputs
ALDL, PCM BATT, and I/P Fuses
RR BLO, RRDR MDL, HVAC BAT, 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)
Class 2 Serial Data (1 of 3)
Figure 2:

Content Theft Deterrent (CTD) System Inputs and Outputs


Object Number: 1412194  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Content Theft Deterrent CTD) System Door Inputs
Vehicle Theft Deterrent (VTD) System
Class 2 Serial Data (2 of 3)
Class 2 Serial Data (3 of 3)
Horns Schematics
Flasher Module, Turn Signal and Hazard Switch
Rear Compartment Lid Ajar Signal
Door Open Inputs (w/B9Q)
Class 2 Serial Data (1 of 3)
G402 - 1 of 2
G402 - 1 of 2
G104
G104
Figure 3:

Content Theft Deterrent (CTD) System Door Inputs


Object Number: 1412195  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Content Theft Deterrent (CTD) System Inputs and Outputs
Door Open Inputs (w/ V4U)
Driver Door Power Door Lock
Class 2 Serial Data (3 of 3)
Class 2 Serial Data (2 of 3)
Door Open Inputs (w/ V4U)
Door Open Inputs (w/ V4U)
Door Open Inputs (w/ V4U)
Door Open Inputs (w/ V4U)
Door Open Inputs (w/ V4U)