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
Left Underhood Fuse Block- BAT 1/ Rear Fuse Block- RDM, C/LTR, DDM, HTDST L, TRK REL Fuses and Trunk Lid Release Relay/ IP Fuse Block- PDM, SBM, CSTR/SBM Fuses
IP Fuse Block- HVAC and A/C Fuses
Left Underhood Fuse Block- BAT 1/ Rear Fuse Block- RDM, C/LTR, DDM, HTDST L, TRK REL Fuses and Trunk Lid Release Relay/ IP Fuse Block- PDM, SBM, 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
Stoplamp Switch
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
Left Underhood Fuse Block- RUN/CRK Fuse and IGN Relay
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
Left Underhood Fuse Block- BAT 1/ Rear Fuse Block- RDM, C/LTR, DDM, HTDST L, TRK REL Fuses and Trunk Lid Release Relay/ IP Fuse Block- PDM, SBM, CSTR/SBM Fuses
Seat Belt Schematics
Module Power, Ground, Serial Data, and MIL
Power, Ground and Serial Data Lines
Content Theft Deterrent
Sensors
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
Engine Data Sensors- 5 Volt and Low Reference
G100, G101, G102 and G103
G202 (4 of 4)