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

Module Power


Object Number: 1908809  Size: FS
Master Electrical Component List
Control Module References
Module Ground, Serial Data, and MIL, Wait to Start, Water in Fuel Indicators
ENGINE and PCM-1 Fuses/Circuit Breakers
Engine Data Sensors - EGR Valve and Glow Plug Controls
G100 - LF8
ENGINE and PCM-1 Fuses/Circuit Breakers
ENGINE and PCM-1 Fuses/Circuit Breakers
TRANS Fuse/Circuit Breaker
TRANS Fuse/Circuit Breaker
TRANS Fuse/Circuit Breaker
Engine Data Sensors - EGR Valve and Glow Plug Controls
Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control
Fuel Controls - Fuel Sensors, Suction Control Valve (SCV), Exhaust Temperature, DPF Pressure Sensors, and Exhaust Brake Solenoid
A/C COMP, HTD FUEL, PCM-B and RR DEFOG Fuses
Figure 2:

Module Ground, Serial Data, and MIL, Wait to Start, Water in Fuel Indicators


Object Number: 1908812  Size: FS
Master Electrical Component List
Control Module References
Engine Data Sensors - 5-Volt and Low Reference
Module Power
DIC
G203 - 3 of 4
AIRBAG, GAGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
AIRBAG, GAGES, LT REAR TURN/STOP, and RT REAR TURN/STOP Fuses/Circuit Breakers
Instrument Panel Cluster - 1 of 2
G203 - 3 of 4
J1939 Serial Data, 2 of 2 - L18 w/JE4, LF6, LF8
Splice Pack SP203
Figure 3:

Engine Data Sensors - 5-Volt and Low Reference


Object Number: 1908814  Size: FS
Master Electrical Component List
Control Module References
Engine Data Sensors - Manifold, and Engine Oil Pressure, Turbocharger Vane Position, and Intake Throttle
Module Ground, Serial Data, and MIL, Wait to Start, Water in Fuel Indicators
Figure 4:

Engine Data Sensors - Manifold, and Engine Oil Pressure, Turbocharger Vane Position, and Intake Throttle


Object Number: 1908816  Size: FS
Master Electrical Component List
Turbocharger System Description
Control Module References
Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control
Engine Data Sensors - 5-Volt and Low Reference
Figure 5:

Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control


Object Number: 1908820  Size: FS
Master Electrical Component List
Turbocharger System Description
Control Module References
Engine Data Sensors - APP Sensor and High Idle Switch - UF3
Engine Data Sensors - Manifold, and Engine Oil Pressure, Turbocharger Vane Position, and Intake Throttle
Module Power
Engine Data Sensors - EGR Valve and Glow Plug Controls
Engine Data Sensors - EGR Valve and Glow Plug Controls
Fuel Controls - Fuel Sensors, Suction Control Valve (SCV), Exhaust Temperature, DPF Pressure Sensors, and Exhaust Brake Solenoid
Figure 6:

Engine Data Sensors - APP Sensor and High Idle Switch - UF3


Object Number: 1908822  Size: FS
Master Electrical Component List
Control Module References
Engine Data Sensors - VSS and Injector Timing Controls
Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control
AXL/4WD, BRK, HYD/AIR BRK, and HTR/AC Fuses/Circuit Breakers
AXL/4WD, BRK, HYD/AIR BRK, and HTR/AC Fuses/Circuit Breakers
G101 - 1 of 2
Figure 7:

Engine Data Sensors - VSS and Injector Timing Controls


Object Number: 1908824  Size: FS
Master Electrical Component List
Control Module References
Engine Data Sensors - EGR Valve and Glow Plug Controls
Engine Data Sensors - APP Sensor and High Idle Switch - UF3
Manual Transmission Schematics
Module Power, Ground, Serial Data, MIL, VSS, and Torque Controls
Instrument Panel Cluster - 2 of 2
Figure 8:

Engine Data Sensors - EGR Valve and Glow Plug Controls


Object Number: 1908836  Size: FS
Master Electrical Component List
Glow Plug System Description
Control Module References
Fuel Controls - Fuel Sensors, Suction Control Valve (SCV), Exhaust Temperature, DPF Pressure Sensors, and Exhaust Brake Solenoid
Engine Data Sensors - VSS and Injector Timing Controls
J1939 Serial Data, 2 of 2 - L18 w/JE4, LF6, LF8
Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control
Module Power
Module Power
Batteries - LF6/LF8 and B+ Bus
Figure 9:

Fuel Controls - Fuel Sensors, Suction Control Valve (SCV), Exhaust Temperature, DPF Pressure Sensor, and Exhaust Brake Solenoid


Object Number: 1908840  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Fuel Controls - Fuel Injectors, Fuel Rail Pressure (FRP)
Engine Data Sensors - EGR Valve and Glow Plug Controls
Fuel Gage
Module Power
Engine Data Sensors - Mass Air Flow, Temperature, and Turbocharger Vane Position Control
Fuel Gage
Figure 10:

Fuel Controls - Fuel Injectors, Fuel Rail Pressure (FRP)


Object Number: 1908846  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Power Take Off (PTO) System References
Fuel Controls - Fuel Sensors, Suction Control Valve (SCV), Exhaust Temperature, DPF Pressure Sensors, and Exhaust Brake Solenoid
Figure 11:

Power Take Off (PTO) System References


Object Number: 1908849  Size: FS
Master Electrical Component List
Control Module References
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Injectors, Fuel Rail Pressure (FRP)
w/o LF6 1 of 2
w/o LF6 2 of 2
w/o LF6 2 of 2
Figure 12:

Controlled/Monitored Subsystem References


Object Number: 1908851  Size: FS
Master Electrical Component List
Control Module References
Power Take Off (PTO) System References
LF8/LMM
HPZ with Automatic Transmission
Manual Transmission Schematics
Starting System - LF6/LF8
Charging System - LF6/LF8
Engine Mechanical Schematics - LF8
Instrument Panel Cluster - 2 of 2
Engine Cooling Schematics
08 MD-560C HVAC Schematics (C60) - A/C Compressor Controls - LF6/LF8
Instrument Panel Cluster - 2 of 2
Engine Exhaust Schematics
Stop Lamp Switch
BRK Fuses/Circuit Breaker
Backup Lamp Control