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

Power, Ground, Serial Data and MIL


Object Number: 1786476  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5-Volt and Low References
Underhood Fuse Block RUN/CRANK Relay, ABS, IGN 1, INJ, ECM IGN 1 and TRANS Fuses
Underhood Fuse Block RUN/CRANK Relay, ABS, IGN 1, INJ, ECM IGN 1 and TRANS Fuses
Underhood Fuse Block A/C CLUTCH and PWR/TRN Relays, A/C CLU, EMISSION 1, ETC and INJ Fuses
Underhood Fuse Block IBCM 1, Body Control Module (BCM) AIRBAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR and RADIO Fuses
Underhood Fuse Block IBCM 1, Body Control Module (BCM) AIRBAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR and RADIO Fuses
G103, G104 and G105
Power, Ground and High Speed Serial Data
Figure 2:

5-Volt and Low References


Object Number: 1786480  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
ECT, MAF/IAT and MAP Sensors
Power, Ground, Serial Data and MIL
Figure 3:

ECT, MAF/IAT and MAP Sensors


Object Number: 1786483  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Heated Oxygen Sensors
5-Volt and Low References
Underhood Fuse Block A/C CLUTCH and PWR/TRN Relays, A/C CLU, EMISSION 1, ETC and INJ Fuses
G103, G104 and G105
Turn Signals and Stop Lamps
Brake Pedal Position Sensor and Stop Lamp Switch Signal
Figure 4:

Heated Oxygen Sensors


Object Number: 1786485  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Electronic Throttle Controls
ECT, MAF/IAT and MAP Sensors
Underhood Fuse Block A/C CLUTCH and PWR/TRN Relays, A/C CLU, EMISSION 1, ETC and INJ Fuses
Figure 5:

Electronic Throttle Controls


Object Number: 1786487  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition System
Heated Oxygen Sensors
Engine Controls Schematic Icons
Figure 6:

Ignition System


Object Number: 1786489  Size: FS
Master Electrical Component List
Camshaft Actuator System Description
Control Module References
Fuel Pump Controls
Electronic Throttle Controls
Underhood Fuse Block RUN/CRANK Relay, ABS, IGN 1, INJ, ECM IGN 1 and TRANS Fuses
Engine Controls Schematic Icons
G106
Engine Controls Schematic Icons
Figure 7:

Fuel Pump Controls


Object Number: 1786490  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
EVAP Controls, Fuel Injectors and FTP Sensor
Ignition System
Underhood Fuse Block A/C CLUTCH and PWR/TRN Relays, A/C CLU, EMISSION 1, ETC and INJ Fuses
Underhood Fuse Block RBEC 2, RUN RLY, Body Control Module (BCM), HVAC BLOWER HIGH Relay, RUN Relay, HVAC BLOWER, HVAC CTRL (IGN) Rear Fuse Block FUEL/PMP Relay, PARK LP Relay, TRUNK Relay, DRV ST
Underhood Fuse Block RBEC 2, RUN RLY, Body Control Module (BCM), HVAC BLOWER HIGH Relay, RUN Relay, HVAC BLOWER, HVAC CTRL (IGN) Rear Fuse Block FUEL/PMP Relay, PARK LP Relay, TRUNK Relay, DRV ST
Indicators
G302
G301
Figure 8:

EVAP Controls, Fuel Injectors and FTP Sensor


Object Number: 1786495  Size: FS
Master Electrical Component List
Evaporative Emission Control System Description
Control Module References
Controlled/Monitored Subsystem References
Fuel Pump Controls
Underhood Fuse Block A/C CLUTCH and PWR/TRN Relays, A/C CLU, EMISSION 1, ETC and INJ Fuses
Underhood Fuse Block RBEC 2, RUN RLY, Body Control Module (BCM), HVAC BLOWER HIGH Relay, RUN Relay, HVAC BLOWER, HVAC CTRL (IGN) Rear Fuse Block FUEL/PMP Relay, PARK LP Relay, TRUNK Relay, DRV ST
Figure 9:

Controlled/Monitored Subsystem References


Object Number: 1786498  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
EVAP Controls, Fuel Injectors and FTP Sensor
Charging System
Starting System
Charging System
Cooling Fans
Indicators