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

DLC, Ground, MIL and Power


Object Number: 1772190  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5-Volt Reference Bussing
BCM Fuses: CLSTR/HUD, CRUISE SWTCH, CTSY/LAMP, DR LCK, EXH MDL, HVAC/PWR SND, ISRVM/HVAC and RUN CRNK Relay
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
BCM Fuses: ECM, HTD SEAT/WPR Relays, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay
Navigation - Japan (U3Z)
Ground, Power and Wiper Motor
Class 2
GMLAN - A/T
GMLAN - M/T
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
BCM Fuses: ECM, HTD SEAT/WPR Relays, GM LAN RUN/CRNK, and SDM/AOS AIRBAG, Fuse Block - Underhood ABS/MRRTD and TCM/TRANS Fuses and WIPER RUN/ACC Relay
Cranking, 1 of 2
Cranking, 2 of 2
DLC, Ground, Power, and Stop Lamp Signal
G104, G106, and G303
Figure 2:

5-Volt Reference Bussing


Object Number: 1772191  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Low Reference Bussing
DLC, Ground, MIL and Power
Figure 3:

Low Reference Bussing


Object Number: 1772196  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Pressure, Temperature, IAT/MAF, VSS and Brake Travel
5-Volt Reference Bussing
Figure 4:

Engine Data Sensors - Pressure, Temperature, IAT/MAF, VSS and Brake Travel


Object Number: 1772200  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Oxygen Sensors
Low Reference Bussing
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Hazard, Stop Lamps, and Turn Signal Outputs (Y07/Y67)
Hazard, Stop Lamps, and Turn Signal Outputs (Y87
Gages
Manual Transmission Schematics
DLC, Ground, Power, and Stop Lamp Signal
G104, G106, and G303
Figure 5:

Engine Data Sensors - Oxygen Sensors


Object Number: 1772205  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Engine Data Sensors - Electronic Throttle Controls
Engine Data Sensors - Pressure, Temperature, IAT/MAF, VSS and Brake Travel
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Figure 6:

Engine Data Sensors - Electronic Throttle Controls


Object Number: 1772207  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition Controls System - Bank 1
Engine Data Sensors - Oxygen Sensors
Figure 7:

Ignition Controls System - Bank 1


Object Number: 1772221  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Ignition Controls System - Bank 2
Engine Data Sensors - Electronic Throttle Controls
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
G105 and G107
Figure 8:

Ignition Controls System - Bank 2


Object Number: 1772224  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Ignition Controls - Sensors
Ignition Controls System - Bank 1
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
G105 and G107
Figure 9:

Ignition Controls - Sensors


Object Number: 1772261  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Fuel Controls - Fuel Pump Controls and Injectors
Ignition Controls System - Bank 2
Engine Controls Schematic Icons
Figure 10:

Fuel Controls - Fuel Pump Controls and Injectors


Object Number: 1772290  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Fuel Controls - EVAP Controls
Ignition Controls - Sensors
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Fuse Block - Underhood Bussing
G102
Gages
G102
G302, G401, and G402
Figure 11:

Fuel Controls - EVAP Controls


Object Number: 1772297  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Controlled/Monitored Subsystem References
Fuel Controls - Fuel Pump Controls and Injectors
DLC, Ground, MIL and Power
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
Fuse Block - Underhood A/C COMP, EMISSION, EVEN INJ, MAN TRAN SOL, O2 SEN, ODD INJ, and PT INPUT/ETC Fuses, A/C COMP and POWERTRAIN IGN1, Relays
Fuse Block - Underhood ABS, AMP, BATT2, COOLFAN, ECM/TCM/EASY KEY, HORN/ALT SENSE, HVAC, and MRRTD Fuses
Low Reference Bussing
Figure 12:

Controlled/Monitored Subsystem References


Object Number: 1772301  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Cranking, 2 of 2
Cranking, 1 of 2
Compressor Controls
Engine Cooling Schematics
Messages
Gages