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

Power, Ground, Serial Data, MIL, and Security


Object Number: 1472785  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Body Control Module (BCM) Programming/RPO Configuration
Gages
B+ Bus - Underhood Fuse Block
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Vehicle Theft Deterrent
Data Link Connector (DLC) Schematics
G300, G301, G302, and G303
Figure 2:

Gages


Object Number: 1472822  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Body Control Module (BCM) Programming/RPO Configuration
Indicators
Power, Ground, Serial Data, MIL, and Security.
Data Link Connector (DLC) Schematics
Figure 3:

Indicators


Object Number: 1472823  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Body Control Module (BCM) Programming/RPO Configuration
Gages
Turn Signal Lamps
Data Link Connector (DLC) Schematics