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For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2006 🢒 Envoy - 4WD 🢒 Accessories 🢒 Theft Deterrent - Immobilizer - Some Export Vehicles 🢒 Theft Deterrent System Schematics
Figure 1:

Theft Deterrent Control Module and Alarm
Object Number: 1594396 Size: FS
Master Electrical Component List
Theft Systems Description and Operation
Control Module References
Intrusion and Indication Sensor Signals
Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, IGN A and CRNK Fuses
FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses
Underhood Fuse Block
AIR PUMP, EAP, ECM, HDM, HI HEADLAMP-LT, HI HEADLAMP-RT, IGN COILS, LO HEADLAMP-LT, LO HEADLAMP-RT, PCM B and TBC I Fuses
AUX PWR 1, RR HVAC, SUNROOF, TBC 2, TBC 3, TBC 4, TBC 5, and TCM CNSTR Fuses
SP205
Power, Ground, Data Link Connector
G102
G201 - 2 of 2, and G305
Figure 2:

Intrusion and Indication Sensor Signals
Object Number: 1594398 Size: FS
Master Electrical Component List
Theft Systems Description and Operation
Control Module References
Theft Deterrent Control Module and Alarm
B+ Bus - Rear Fuse Block
HVAC B, LGM/DSM, OH BATT/ONSTAR, and RADIO FUSES
HVAC B, LGM/DSM, OH BATT/ONSTAR, and RADIO FUSES