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

Module Power, Ground, Serial Data, and MIL


Object Number: 1594008  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
Engine Controls Schematic Icons
Underhood Fuse Block
ACCY/RUN, RUN/START, Bus Bars, and IGN B Fuse
BCK/UP, BTSI, IGN E, TBC IGN1, and TRLR BCK/UP Fuses
BCK/UP, BTSI, IGN E, TBC IGN1, and TRLR BCK/UP Fuses
Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, IGN A and CRNK Fuses
FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses
Power, Ground, Serial Data, and MIL
FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses
G108
SP205
Power, Ground, Data Link Connector
Figure 2:

Underhood Fuse Block - PWR/TRN Relay - 1 of 2


Object Number: 1594009  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
Module Power, Ground, Serial Data, and MIL
Engine Controls Schematic Icons
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
Underhood Fuse Block
Figure 3:

Underhood Fuse Block - PWR/TRN Relay - 2 of 2


Object Number: 1594011  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - 5-Volt and Low Reference
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
Engine Controls Schematic Icons
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
Underhood Fuse Block
Figure 4:

Engine Data Sensors - 5-Volt and Low Reference


Object Number: 1594012  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - MAF, Pressure, Temperature, and VSS
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
Engine Controls Schematic Icons
Figure 5:

Engine Data Sensors - MAF, Pressure, Temperature, and VSS


Object Number: 1594013  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Oxygen Sensors
Engine Data Sensors - 5-Volt and Low Reference
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
Gages
G108
Figure 6:

Engine Data Sensors - Oxygen Sensors


Object Number: 1594014  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Throttle Actuator Controls
Engine Data Sensors - MAF, Pressure, Temperature, and VSS
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
G108
Figure 7:

Engine Data Sensors - Throttle Actuator Controls


Object Number: 1594016  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition Controls - Ignition Coils 1, 3, 5, and 7
Engine Data Sensors - Oxygen Sensors
Engine Controls Schematic Icons
5.3L/6.0L
Figure 8:

Ignition Controls - Ignition Coils 1, 3, 5, and 7


Object Number: 1594018  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Ignition Controls - Ignition Coils 2, 4, 6, and 8
Engine Data Sensors - Throttle Actuator Controls
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
G109
Figure 9:

Ignition Controls - Ignition Coils 2, 4, 6, and 8


Object Number: 1594021  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Ignition Controls - Sensors and DOD Controls
Ignition Controls - Ignition Coils 1, 3, 5, and 7
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
G109
Figure 10:

Ignition Controls - Sensors and DoD Controls


Object Number: 1594022  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Fuel Controls - Fuel Pump and Fuel Injectors
Ignition Controls - Ignition Coils 2, 4, 6, and 8
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
Engine Controls Schematic Icons
Figure 11:

Fuel Controls - Fuel Pump and Fuel Injectors


Object Number: 1594024  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Fuel Controls - EVAP Controls
Ignition Controls - Sensors and DOD Controls
Engine Controls Schematic Icons
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
Underhood Fuse Block
G104, G105, and G107
Underhood Fuse Block - PWR/TRN Relay - 1 of 2
G201 - 2 of 2, and G305
Figure 12:

Fuel Controls - EVAP Controls


Object Number: 1594025  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Control Module References
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Pump and Fuel Injectors
Engine Controls Schematic Icons
Fuel Gage
Underhood Fuse Block - PWR/TRN Relay - 2 of 2
ENG I, ETC, INJA, INJB, O2 SNSR A, and O2 SNSR B Fuses - 5.3L/6.0L
Underhood Fuse Block
AUX PWR 1, RR HVAC, SUNROOF, TBC 2, TBC 3, TBC 4, TBC 5, and TCM CNSTR Fuses
Figure 13:

Controlled/Monitored Subsystem References


Object Number: 1594027  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Engine Controls Schematic Icons
Gages
Power, Ground, Serial Data, and Transfer Case Encoder Motor
Fuel Gage
Gages
Compressor Controls
Compressor Controls
Charging System
Starting System
EBCM Power, Ground, Serial Data, Indicator, and Signal Circuits
PNP Switch and VSS
Engine Cooling Schematics