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

Power, Ground, and Illumination


Object Number: 1637881  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
Displays
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
G201
Power, Ground, Serial Data and MIL
Power, Ground, Serial Data and MIL
Ground, MIL, Power and Serial Data
Vehicle Theft Deterrent (VTD) System
Content Theft Deterrent (CTD) System
Figure 2:

Indicators


Object Number: 1637883  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Power, Ground and Illumination
Low Speed Serial Data
Power, Ground, Class 2 and High Speed Serial Data
Figure 3:

Driver Information Center Display


Object Number: 1705991  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators
Low Speed Serial Data
Power, Ground, Class 2 and High Speed Serial Data