GM Service Manual Online
For 1990-2009 cars only
Figure 1:

Power, Ground and Class 2


Object Number: 660878  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gages
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
eft Underhood Fuse Block- BAT 1 Fuse/ Rear Fuse BLock-RDM, C/LTR, DDM, HTDST L, TRK REL Fuses/ I/P Fuse Block- PDM, SBM, and CSTR/SBM Fuses
I/P Fuse Block- HVAC and A/C Fuses
eft Underhood Fuse Block- BAT 1 Fuse/ Rear Fuse BLock-RDM, C/LTR, DDM, HTDST L, TRK REL Fuses/ I/P Fuse Block- PDM, SBM, and CSTR/SBM Fuses
G202 (4 of 4)
Class 2 Serial Data Line
Figure 2:

Gages


Object Number: 660880  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators
Power, Ground, and Class 2
Head Up Display Schematics
Brake Pedal Switches and Indicator
Power and Ground
Class 2 Serial Data Line
Figure 3:

Indicators


Object Number: 660882  Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Driver Information Center
Gages
Battery Voltage Supply to Underhood Fuse Blocks
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Left Underhood Fuse Block- OXY SEN and SBM LCM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
Rear Fuse Block- CRK, PCM/CRU and SBM Fuses
eft Underhood Fuse Block- BAT 1 Fuse/ Rear Fuse BLock-RDM, C/LTR, DDM, HTDST L, TRK REL Fuses/ I/P Fuse Block- PDM, SBM, and CSTR/SBM Fuses
Seat Belt Schematics
Module Power, Ground, Serial Data, and MIL
Power, Ground, and Serial Data
Content Theft Deterrent (CTD) System
Fuel Controls- Fuel Pump Controls
Figure 4:

Driver Information Center


Object Number: 660887  Size: FS
Master Electrical Component List
Audible Warnings Description and Operation
Indicators
Class 2 Serial Data Line
5 Volt and Low Reference
G100, G101, G102 and G103
G202 (4 of 4)