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

Instrument Panel Cluster 1 of 2


Object Number: 1493995  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Instrument Panel Cluster - 2 of 2
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
Ignition Switch - OFF/RUN/START, RUN/START, and START Bus Bars
TRANS Fuse/Circuit Breaker
CHMSL, PWR POST, and RDO/CHIME Fuses/Circuit Breakers
AUX WIRE and IGN-4 (I/P Fuse Block -1) Fuses/Circuit Breakers
AIRBAG, GAUGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
Park and Marker Lamps
Headlights/Daytime Running Lights (DRL) Schematics
Hazard and Turn Signal
Interior Lights Dimming Schematics
Fuse Blocks, IGN-A Relay, Ground, Serial Data and MIL
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data, and MIL
Module Power, Ground, Serial Data and MIL
Headlights/Daytime Running Lights (DRL) Schematics
Air Brake Warning System
DIC
Brake Warning Indicators
Air Brake Warning System
Figure 2:

Instrument Panel Cluster 2 of 2


Object Number: 1645648  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Fuel Gage
Instrument Panel Cluster - 1 of 2
Splice Pack SP203
Controlled/Monitored Subsystem Reference
G119 and G120
G100 - L18
Figure 3:

Fuel Gage


Object Number: 1645651  Size: FS
Master Electrical Component List
Instrument Cluster Description and Operation
Instrument Panel Cluster - 2 of 2
J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5
Splice Pack SP203