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

Power, Ground, DLC, Odometer and Clock


Object Number: 1618796  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Indicators
Fuse Block Right Rear: LT Turn Signal, RIM(1), Rear Fog Lamp, FT Passenger Door Module, Heated Steering Column, IGN 1, RIM(2) and Airbag Fuses; Rear Fog Lamp and IGN 1 Relays
Fuse Block Underhood Bussing
G104 (1 of 2)
Fuse Block - Underhood: Starter IGN 1 Relays; Starter, Starter Relay, CCP TCM/IPM/ECM, MAF, ABS and Washer Nozzle/ACC Fuses
Fuse Block - Underhood Fuses/Relays: IPM/ALDL, Auto Headlamp Dimming, CCP, ECM/TCM, WPR MOD, WPR SW/VICS and Rain Sensor/HDLP Wash Fuses, Accessory Relay
G104 (1 of 2)
G200 (2 of 2)
GMLAN Low Speed (2 of 2)
Figure 2:

Indicators


Object Number: 1618794  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
DIC/Dimmer Switch
Power, Ground, Odometer and Clock
Engine Data Sensors - 5-Volt Reference Bus
GMLAN Low Speed (2 of 2)
GMLAN High Speed - Domestic w/ UE1
Engine Data Sensors - Low Reference Bus
ECM Power, Ground, DLC and MIL
ECM Power, Ground, DLC and MIL
ECM Power, Ground, Serial Data and MIL
Brake Warning System Schematics
Figure 3:

DIC/Dimmer Switch


Object Number: 1618793  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
Engine Oil and Fuel Tank Level
Indicators
Dimming Lamps (1 of 3)
G200 (2 of 2)
Figure 4:
Object Number: 1618792  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Control Module References
DIC/Dimmer Switch
GMLAN High Speed - Domestic w/ UE1
GMLAN High Speed - Domestic w/ UE1
Engine Data Sensor 5-Volt and Low Reference
Engine Data Sensors - Low Reference Bus
Engine Data Sensors - 5-Volt and Low References
Engine Data Sensors - Low Reference Bus
06 STS Ground Dist - G100 (LH2)
Engine Data Sensors - Low Reference Bus