GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2002 🢒 TrailBlazer - 2WD 🢒 Body and Accessories 🢒 Instrument Panel, Gages, and Console 🢒 Instrument Cluster Schematics
Figure 1:

Power, Ground, Serial Data, and Gages
Object Number: 664731 Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators
Front Lamps
B+ Bus - Underhood Fuse Block
ACCY/RUN and RUN/START Bus Bars
IGN E, TBC IGN1, BACK UP, BTSI, and TRLR B/U Fuses
Indicators
DLC and SP205
G102, G104, G105, and G109
Figure 2:

Indicators
Object Number: 664736 Size: FS
Master Electrical Component List
Indicator/Warning Message Description and Operation
Power, Ground, Serial Data, and Gages
Power, Ground, Serial Data, and Gages
Driver Information System Schematics
Wiper/Washer Switch, and Washer Fluid Level Switch