GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2005 🢒 TrailBlazer - 2WD 🢒 Accessories 🢒 Theft Deterrent - Immobilizer - Some Export Vehicles 🢒 Theft Deterrent System Schematics
Figure 1:

Theft Deterrent Control Module and Alarm
Object Number: 1429942 Size: FS
Master Electrical Component List
Vehicle Theft Deterrent (VTD) Description and Operation
Control Module References
Intrusion and Indication Sensor Signals
Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, IGN A and CRANK Fuses
FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses
B+ Bus - Underhood Fuse Block
Ignition Switch - ACCY/RUN and RUN/START Bus Bars, IGN B Fuse
4WD, ENG I, HVAC, O2, SIR, and TAC Fuses
AIR, COILS, EAP, ECM, HDM, HI HDLP-LT, HI HDLP-RT, LOW HDLP-RT, LOW HDLP-LT, PCMB, and TCB1 Fuses
4WD, ENG I, HVAC, O2, SIR, and TAC Fuses
G102
G201 - 2 of 2 and G305
Figure 2:

Intrusion and Indication Sensor Signals
Object Number: 1429944 Size: FS
Master Electrical Component List
Vehicle Theft Deterrent (VTD) Description and Operation
Control Module References
Theft Deterrent Control Module and Alarm
B+ Bus - Rear Fuse Block
HVAC B, LGM/DSM, OHBATT/ONSTAR, and RADIO Fuses
HVAC B, LGM/DSM, OHBATT/ONSTAR, and RADIO Fuses