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

Data Link, Ground, MIL, and Power


Object Number: 1855148  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5-Volt and Low Reference
EMISSIONS, ECM, and LIGHTER Fuses
WINDOWS, DOOR LKS, INT LPS, ECM/TCM, RADIO, and SDM Fuses
TANK VENT, OUTLET, IP IGN, BACKUP, ABS, and ECM TRANS Fuses
High Speed LAN
G103, G304, G105, G104, and G106
Figure 2:

5-Volt and Low Reference


Object Number: 1855150  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Engine Data Sensors - Pressure and Temperature
Data Link, Ground, MIL, and Power
Figure 3:

Engine Data Sensors - Pressure and Temperature


Object Number: 1855152  Size: FS
Master Electrical Component List
Air Intake System Description
Control Module References
Engine Data Sensors - Oxygen Sensors
5-Volt and Low Reference
B+ Bus Bar - 1 of 2
EMISSIONS, ECM, and LIGHTER Fuses
G103, G304, G105, G104, and G106
Figure 4:

Engine Data Sensors - Oxygen Sensors


Object Number: 1855154  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Engine Throttle Controls
Engine Data Sensors - Pressure and Temperature
EMISSIONS, ECM, and LIGHTER Fuses
Figure 5:

Engine Data Sensors - Electronic Throttle Control


Object Number: 1855162  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition Controls - Sensors
Engine Data Sensors - Oxygen Sensors
Figure 6:

Ignition Controls - Sensors


Object Number: 1855164  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Fuel Controls - Fuel Pump Controls and Fuel Injectors
Engine Data Sensors - Engine Throttle Controls
EMISSIONS, ECM, and LIGHTER Fuses
Figure 7:

Fuel Controls - Fuel Pump Controls and Fuel Injectors


Object Number: 1855167  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Ignition Controls - Ignition System
Ignition Controls - Sensors
B+ Bus Bar - 1 of 2
G101 and G102
G301, G102, G303, and G402
G101 and G102
Figure 8:

Ignition Controls - Ignition System


Object Number: 1855169  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Fuel Controls - EVAP Controls
EMISSIONS, ECM, and LIGHTER Fuses
G103, G304, G105, G104, and G106
Figure 9:

Fuel Controls - EVAP Controls


Object Number: 1855172  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Control Module References
Controlled/Monitored Subsystem References
Ignition Controls - Ignition System
EMISSIONS, ECM, and LIGHTER Fuses
TANK VENT, OUTLET, IP IGN, BACKUP, ABS, and ECM TRANS Fuses
Figure 10:

Controlled/Monitored Subsystem References


Object Number: 1855174  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Backup Lamps
Backup Lamps
Sensors and Switches
Cruise Control Schematics
Manual Transmission Schematics
Hydraulic Brakes Schematics
Starting and Charging Schematics
Engine Cooling Schematics
Compressor Controls
Ground, Power, and Blower Controls