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

Module Power, Ground, Serial Data and MIL


Object Number: 792537  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors - 5 Volt and Low Reference
Engine Controls Schematic Icons
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses
I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
I/P Fuse Block, START and TRANS Fuses/Circuit Breakers
Underhood Fuse Block, PCM-B, HTD FUEL, A/C COMP, and RR DEFOG Fuses
I/P Fuse Block, R-RR TRUCK, L-RR TRUCK, GAGES, and SIR Fuses/Circuit Breaker
Splice Pack SP203 (L18/LB7/LG4)
G200, G202, and G203 - 1 of 4
G100 (L18)
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference


Object Number: 792539  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Fuse Block - Underhood Ignition A Relay
Module Power, Ground, Serial Data, and MIL
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors-Pressure and Temperature


Object Number: 792540  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Engine Data Sensors-VSS
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
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7)
Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7)
G200, G202, and G203 - 1 of 4
Figure 4:

Engine Data Sensors- VSS


Object Number: 830106  Size: FS
Master Electrical Component List
Air Intake System Description
Engine Data Sensors - Oxygen Sensors
Fuse Block - Underhood Ignition A Relay
Engine Controls Schematic Icons
PNP Switch and Trans Opt Connector
Instrument Panel Cluster - 2 of 2
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 5:

Engine Data Sensors - Oxygen Sensors


Object Number: 792541  Size: FS
Master Electrical Component List
Air Intake System Description
Engine Data Sensors - Electronic Throttle Controls
Engine Data Sensors-VSS
Engine Controls Schematic Icons
Underhood Fuse Block, ENG 3 and ENG 2 Fuses (L18)
Ignition Switch, RUN and ACC/RUN Bus Bars
BRAKE, CHASSIS, HTR/AC, and AXLE/4WD Fuses/Circuit Breakers
G101 - 1 of 2
Figure 6:

Engine Data Sensors-Throttle Actuator Controls


Object Number: 823569  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Ignition Controls - Ignition Systems - 1 of 2
Engine Data Sensors - Oxygen Sensors
Engine Controls Schematic Icons
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
I/P Fuse Block, BRAKE ISO Fuse/Circuit Breaker
Cruise Control Switch (L18/LB7)
G203 - 2 of 4
Figure 7:

Ignition Controls-Ignition System - 1 of 2


Object Number: 792543  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Ignition Controls - Ignition System - 2 of 2
Engine Data Sensors - Electronic Throttle Controls
Engine Controls Schematic Icons
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
B+ Bus Bar
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
Ignition Controls - Ignition System - 2 of 2
Underhood Fuse Block, ENG 3 and ENG 2 Fuses (L18)
G100 (LG4)
G100 (LG4)
Figure 8:

Ignition Controls - Ignition System - 2 of 2


Object Number: 830108  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Ignition Systems - CMP and CKP Sensors
Ignition Controls - Ignition Systems - 1 of 2
Engine Controls Schematic Icons
Ignition Controls - Ignition Systems - 1 of 2
Ignition Controls - Ignition Systems - 1 of 2
Figure 9:

Ignition Systems - CMP and CKP Sensors


Object Number: 792597  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Fuel Controls - Fuel Pump Controls
Ignition Controls - Ignition System - 2 of 2
Engine Controls Schematic Icons
Figure 10:

Fuel Controls - Fuel Pump Controls


Object Number: 792598  Size: FS
Master Electrical Component List
Fuel System Description
Fuel System - B3D Only
Ignition Systems - CMP and CKP Sensors
Engine Controls Schematic Icons
B+ Bus Bar
G112, G113, G203 - 4 of 4, G204, G205 and G400
G112, G113, G203 - 4 of 4, G204, G205 and G400
Figure 11:

Fuel Controls - Fuel Injectors


Object Number: 792601  Size: FS
Master Electrical Component List
Fuel System Description
Device Controls - EGR Valve and Solenoid
Fuel System - B3D Only
Engine Controls Schematic Icons
Ignition Switch, OFF/RUN/START, RUN/START, and START Bus Bars
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
Underhood Fuse Block, ENGINE Fuse and I/P Fuse Block, PCM-I Fuse/Circuit Breaker
G100 (L18)
Figure 12:

Device Controls - EGR Valve and Solenoid


Object Number: 792603  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem Reference
Fuel Controls - Fuel Injectors
Engine Controls Schematic Icons
Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7)
Underhood Fuse Block, ENG 4 and ENG 1 Fuses (L18/LB7)
Instrument Panel Cluster - 2 of 2
Blower Controls (C60)
Starter and Charging System (LG4/LG5)
Figure 13:

Controlled/Monitored Subsystem References


Object Number: 792605  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem References
Device Controls - EGR Valve and Solenoid
Engine Controls Schematic Icons
Instrument Panel Cluster - 1 of 2
Electronic Fan Controls, Coolant Level Switch
Starting System (L18/LB7)
Overdrive Defeat and CAN Serial Data
Cruise Control Switch (L18/LB7)
Figure 14:

Controlled/Monitored Subsystem References


Object Number: 792607  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Controlled/Monitored Subsystem Reference
Engine Controls Schematic Icons
Power Takeoff (LG4/L18/LB7) - 1 of 2
Module Power, Ground, Serial Data, MIL, VSS, and Torque Signals