GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2007 🢒 STS 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Immobilizer Schematics
Figure 1:
Object Number: 1822978 Size: FS
Master Electrical Component List
Immobilizer Description and Operation
Control Module References
Door Modules and Horn
GM LAN - High Speed, Domestic w/ UE1
Starting System - LY7
Fuel Controls - Injectors and Pump
Fuel Controls - Fuel Pump and Injectors
Fuel Controls - Injector and Pump
GM LAN - Low Speed 2 of 2
GM LAN - Low Speed 1 of 2
Figure 2:

Door Modules and Horn
Object Number: 1822980 Size: FS
Master Electrical Component List
Immobilizer Description and Operation
Control Module References
Vehicle Theft Deterrent (VTD) System
GM LAN - Low Speed 1 of 2
GM LAN - Low Speed 2 of 2
07 STS Horn Schematics
Park Lamp Relay, Switch and Instrument Cluster - Domestic