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

Module Power, Ground, Serial Data, and MIL


Object Number: 1822960  Size: FS
Master Electrical Component List
Engine Data Sensors - 5-Volt and Low Reference
Batteries - LG4/LG5 and B+ Bus
Ignition Switch - OFF/RUN/START, RUN/START, and START Bus Bars
ENGINE and PCM-1 Fuses/Circuit Breakers
Instrument Panel Cluster - 1 of 2
AIRBAG, GAUGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
G100 - LG5
Data Link Connector Power and Ground, 2 of 2 - LG4/LG5
J1939 Serial Data, 2 of 2 - L18 w/JE4, LG4, LG5
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference


Object Number: 1822962  Size: FS
Master Electrical Component List
Engine Data Sensors - Pressure and Temperature
Module Power, Ground, Serial Data, and MIL
Power Take-Off - 1 of 2
Figure 3:

Engine Data Sensors - Pressure and Temperature


Object Number: 1822964  Size: FS
Master Electrical Component List
Engine Data Sensors - Injection Timing Controls
Engine Data Sensors - 5-Volt and Low Reference
Instrument Panel Cluster - 2 of 2
G112, G113, G203 - 4 of 4, G204, G205, and G400
Figure 4:

Engine Data Sensors - Injection Timing Controls


Object Number: 1822966  Size: FS
Master Electrical Component List
Device Controls - Intake Air (IA) Heater
Engine Data Sensors - Pressure and Temperature
Transmission Controls, Speed Sensors, and Transmission Optional Connector
Manual Transmission Schematics
Engine Data Sensors - 5-Volt and Low Reference
Engine Data Sensors - 5-Volt and Low Reference
Figure 5:

Device Controls - Intake Air (IA) Heater


Object Number: 1822969  Size: FS
Master Electrical Component List
Fuel Controls - Fuel Injectors
Engine Data Sensors - Injection Timing Controls
Module Power, Ground, Serial Data, and MIL
ENG-2 and ENG-3 Fuses - LG5/LLY
Figure 6:

Fuel Controls - Fuel Injectors


Object Number: 1822971  Size: FS
Master Electrical Component List
Power Take-Off - 1 of 2
Device Controls - Intake Air (IA) Heater
Fuel Gage
Figure 7:

Power Take-Off - 1 of 2


Object Number: 1822973  Size: FS
Master Electrical Component List
PTO
Fuel Controls - Fuel Injectors
PTO
Controlled/Monitored Subsystem Reference
Engine Cooling Schematics
Engine Data Sensors - Injection Timing Controls
Engine Data Sensors - Injection Timing Controls
Figure 8:

PTO


Object Number: 1822974  Size: FS
Master Electrical Component List
Controlled/Monitored Subsystem Reference
Power Take-Off - 1 of 2
Module Power, Ground, Serial Data, and MIL
ENG-1 and ENG-4 Fuses - LG4/LG5
G101 - 1 of 2
HPZ with Automatic Transmission
Power Take-Off - 1 of 2
Figure 9:

Controlled/Monitored Subsystem Reference


Object Number: 1822975  Size: FS
Master Electrical Component List
PTO
Instrument Panel Cluster - 2 of 2
Engine Cooling Schematics
Instrument Panel Cluster - 2 of 2
LG5
A/C Compressor Controls - L18/LLY
LG5
A/C Compressor Controls - L18/LLY
G101 - 1 of 2
Power Take-Off - 1 of 2