GM Service Manual Online
For 1990-2009 cars only
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