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

Ground, MIL, Power and Serial Data


Object Number: 1625490  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5 Volt and Low References
Engine Controls Schematic Icons
B+ Bussing
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
Underhood Fuse Block - IBCM 1, Body Control Module (BCM), AIR BAG (BATT), CLUSTER/THEFT, HVAC CTRL (BATT), IGN SENSOR, and RADIO Fuses
G103, G104, and G105
Power, Ground, Class 2 and High Speed Serial Data
G109
Figure 2:

5-Volt and Low References


Object Number: 1625492  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
ECT, MAF and MAP Sensors
Ground, MIL, Power and Serial Data
Engine Controls Schematic Icons
Figure 3:

ECT, MAF and MAP Sensors


Object Number: 1625495  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Heated Oxygen Sensors
5 Volt and Low References
Engine Controls Schematic Icons
Underhood Fuse Block, A/C CLUTCH Relay, PWR/TRN Relay, A/C CLU, EMISSION 1, and ETC Fuses
Power, Ground, Serial Data and MIL
Turn Signals and Stop Lamps
G103, G104, and G105
Figure 4:

Heated Oxygen Sensors


Object Number: 1625498  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Electronic Throttle Controls
Electronic Throttle Controls
Engine Controls Schematic Icons
Power, Ground, Serial Data and MIL
Underhood Fuse Block, A/C CLUTCH Relay, PWR/TRN Relay, A/C CLU, EMISSION 1, and ETC Fuses
Figure 5:

Electronic Throttle Controls


Object Number: 1625501  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition System
Heated Oxygen Sensors
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 6:

Ignition System


Object Number: 1625505  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Fuel Injectors and Fuel Pump
Electronic Throttle Controls
Engine Controls Schematic Icons
Ground, MIL, Power and Serial Data
Underhood Fuse Block, RUN/CRANK Relay, ABS, IGN 1, INJ, PCM IGN 1, and TRANS Fuses
G106
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 7:

Fuel Injectors and Fuel Pump


Object Number: 1625507  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
EVAP Controls and FTP Sensor
Ignition System
Engine Controls Schematic Icons
Underhood Fuse Block, RUN/CRANK Relay, ABS, IGN 1, INJ, PCM IGN 1, and TRANS 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
G302
Indicators
G302
G301
Figure 8:

EVAP Controls and FTP Sensor


Object Number: 1625509  Size: FS
Master Electrical Component List
Intake Manifold Tuning Valve System Description
Control Module References
Controlled/Monitored Subsystem References
Fuel Injectors and Fuel Pump
Engine Controls Schematic Icons
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, A/C CLUTCH Relay, PWR/TRN Relay, A/C CLU, EMISSION 1, and ETC Fuses
Ground, MIL, Power and Serial Data
Ground, MIL, Power and Serial Data
Underhood Fuse Block, A/C CLUTCH Relay, PWR/TRN Relay, A/C CLU, EMISSION 1, and ETC Fuses
G103, G104, and G105
Figure 9:

Controlled/Monitored Subsystem References


Object Number: 1625510  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
EVAP Controls and FTP Sensor
Engine Controls Schematic Icons
Starting System (LZ9)
Charging System
Compressor Controls
Compressor Controls
Engine Cooling Fans
Indicators
Internal Mode Switch (IMS)