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

Module Power, Ground, Serial Data, and MIL


Object Number: 805750  Size: FS
Master Electrical Component List
Engine Data Sensors - 5-volt and Low Reference
Engine Controls Schematic Icons
B+ Bus Bar
Ignition Switch - OFF/RUN/START, RUN/START and START Bus Bars
ENGINE and PCM-I Fuses/Circuit Breakers
GAUGES, L-RR TRUCK, R-RR TRUCK, and SIR Fuses/Circuit Breakers
ENGINE and PCM-I Fuses/Circuit Breakers
Power and Indicators
G100 (LG5)
J1939 Serial Data (L65/L18/LG4/LC8) - 2 of 2
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference


Object Number: 849648  Size: FS
Master Electrical Component List
Engine Data Sensors - Pressure and Temperature
odule Power, Grounds, Serial Data, and MIL
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors - Pressure and Temperature


Object Number: 805755  Size: FS
Master Electrical Component List
Engine Data Sensors - Injection Timing Controls
Engine Data Sensors - 5-volt and Low Reference
Engine Controls Schematic Icons
Controlled/Monitored Subsystem References
G200, G202, and G203 - 1 of 4
Figure 4:

Engine Data Sensors - Injection Timing Controls


Object Number: 805759  Size: FS
Master Electrical Component List
Device Controls - Intake Air Heaters
Engine Data Sensors - Pressure and Temperature
Engine Controls Schematic Icons
Device Controls - Switches
Manual Transmission
Device Controls - Switches
Device Controls - Intake Air Heaters
Figure 5:

Device Controls - Intake Air Heater


Object Number: 805762  Size: FS
Master Electrical Component List
Device Controls - Switches
Engine Data Sensors - Injection Timing Controls
Engine Controls Schematic Icons
ENG 2 and ENG 3 Fuses (LG5/LB7/LLY)
ENG 2 and ENG 3 Fuses (LG5/LB7/LLY)
Engine Data Sensors - Injection Timing Controls
Figure 6:

Fuel Controls


Object Number: 1567123  Size: FS
Master Electrical Component List
Power Take Off
Device Controls - Intake Air Heater
Engine Controls Schematic Icons
Figure 7:

Device Controls - Switches


Object Number: 805815  Size: FS
Master Electrical Component List
Power Take Off
Device Controls - Intake Air Heaters
Engine Controls Schematic Icons
Power Take Off
Power Take Off
Controlled/Monitored Subsystem Reference
Engine Data Sensors - Injection Timing Controls
Electronic Fan Controls, Coolant Level Switch
Engine Data Sensors - Injection Timing Controls
Figure 8:

Power Take-Off


Object Number: 805817  Size: FS
Master Electrical Component List
Controlled/Monitored Subsystem Reference
Device Controls - Switches
Engine Controls Schematic Icons
Device Controls - Switches
G101 - 1 of 2
ENG 1 and ENG 4 Fuses (LG4/LG5)
ENG 1 and ENG 4 Fuses (LG4/LG5)
Device Controls - Switches
Figure 9:

Controlled/Monitored Subsystem References


Object Number: 805821  Size: FS
Master Electrical Component List
Power Take Off
Engine Controls Schematic Icons
Ground and Gages
Electronic Fan Controls, Coolant Level Switch
Ground and Gages
LG5
Blower Controls (C60)
Starting System (L18/LB7/LLY)
Brake Booster Pump
G101 - 1 of 2
Device Controls - Switches