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

Vehicle Theft Deterrent


Object Number: 1242787  Size: FS
Master Electrical Component List
Vehicle Theft Deterrent (VTD) Description and Operation
Class 2 Communication
Steering Wheel Speed/Position
G203 - 3 of 3
G203 - 1 of 3
G203 - 1 of 3
Figure 2:

Class 2 Communication


Object Number: 1242789  Size: FS
Master Electrical Component List
Vehicle Theft Deterrent (VTD) Description and Operation
Door Switch Signals
Vehicle Theft Deterrent
SP205 - 2 of 2
Figure 3:

Door Switch Signals


Object Number: 1242792  Size: FS
Master Electrical Component List
Content Theft Deterrent (CTD) Description and Operation
Class 2 Communication
Door Jamb Switches - w/o YE9
SP205 - 1 of 2
Door Jamb Switches - w/o YE9
Door Jamb Switches - w/YE9 or Y91
Door Jamb Switches - w/YE9 or Y91