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

Power, Ground, Serial Data


Object Number: 865514  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gauges, VSS, Engine Oil Signals-Gas Only
B+ Bus Bar (Gas) - 1 of 3
RTD/ECAS, RR WPR, EAP, SUNROOF, IPC/DIC, SEO 1
Ignition, Run, Start, Accy Bus Bar
O2A, O2B, TBC IGN 1, SEO IGN
G203-1 of 3
G203-2 of 3
SP205 - 1 of 2
G200-1 of 3
Figure 2:

Gages, VSS, Engine Oil Signals-Gas Only


Object Number: 865517  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Vehicle Speed Signal
Power, Ground, Serial Data
Vehicle Speed Signal
G104, G106, G107
SP205 - 2 of 2
G102, G103-Gas
Figure 3:

Vehicle Speed Signal-Gas


Object Number: 884296  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Gauges, VSS, Engine Oil Signals-Diesel Only
Gauges, VSS, Engine Oil Signals-Gas Only
Gauges, VSS, Engine Oil Signals-Gas Only
Figure 4:

Gages, VSS, Engine Oil Signals-Diesel Only


Object Number: 865519  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Indicators, DIC Controls, Washer Fluid Level Sensor
Vehicle Speed Signal
SP205 - 2 of 2
G104, G106, G107
G102, G103, G108, and G109 - Diesel
Figure 5:

Indicators, DIC Controls, Washer Fluid Level Switch


Object Number: 865521  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gauge-Gas Only
Gauges, VSS, Engine Oil Signals-Diesel Only
G203-2 of 3
G203-1 of 3
G100, G101, G105
left Turn Signals - Domestic - GMC
left Turn Signals - Export - GMC
Right Turn Signals - Domestic - GMC
Right Turn Signals - Export - GMC
Figure 6:

Fuel Gage-Gas Only


Object Number: 865524  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gauge-Diesel Only
Indicators, DIC Controls, Washer Fluid Level Sensor
SP205 - 1 of 2
Figure 7:

Fuel Gage-Diesel Only


Object Number: 865523  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gauge-Gas Only
SP205 - 1 of 2