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

ECM Power, Ground, Serial Data, and MIL


Object Number: 1619723  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - 5-Volt Reference Bus
Engine Controls Schematic Icons
Fuse Block Underhood Bussing
Fuse Block - Underhood Fuses/Relays: IPM/ALDL, Auto Headlamp Dimming, CCP, ECM/TCM, WPR MOD, WPR SW/VICS and Rain Sensor/HDLP Wash Fuses, Accessory Relay
Fuse Block - Underhood: Starter IGN 1 Relays; Starter, Starter Relay, CCP TCM/IPM/ECM, MAF, ABS and Washer Nozzle/ACC Fuses
Fuse Block Right Rear: LT Turn Signal, RIM(1), Rear Fog Lamp, FT Passenger Door Module, Heated Steering Column, IGN 1, RIM(2) and Airbag Fuses; Rear Fog Lamp and IGN 1 Relays
G104 (1 of 2)
Fuse Block - Underhood Fuses/Relays: IPM/ALDL, Auto Headlamp Dimming, CCP, ECM/TCM, WPR MOD, WPR SW/VICS and Rain Sensor/HDLP Wash Fuses, Accessory Relay
G109, G112 (LY7)
Data Link Connector Schematics
G104 (1 of 2)
Figure 2:

Engine Data Sensors - 5-Volt Reference Bus


Object Number: 1619724  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Low Reference Bus
ECM Power, Ground, DLC and MIL
Engine Controls Schematic Icons
Figure 3:

Engine Data Sensors - Low Reference Bus


Object Number: 1619725  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Pressure, Temperature, MAF, VSS
Engine Data Sensors - 5-Volt Reference Bus
Engine Controls Schematic Icons
Ignition Controls - Crankshaft Position (CKP) and Knock Sensors
Figure 4:

Engine Data Sensors - Pressure, Temperature, MAF, VSS


Object Number: 1619726  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Oxygen Sensors
Engine Data Sensors - Low Reference Bus
Engine Controls Schematic Icons
Ignition Controls - Crankshaft Position (CKP) and Knock Sensors
G104 (1 of 2)
Fuse Block Underhood Bussing
Fuse Block-Underhood: Starter IGN 1 Relays; Starter, Starter Relay, CCP, TCM/IPM/ECM, MAF, ABS and Washer Nozzle/ACC Fuses
Engine Data Sensors - 5 Volt Reference Bus
Engine Data Sensors - 5 Volt Reference Bus
Automatic Headlamp Dimming Signals, VSS (TT6)
Engine Data Sensors - Low Reference Bus
Figure 5:

Engine Data Sensors - Oxygen Sensors


Object Number: 1619727  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Engine Data Sensors - Electronic Throttle Controls
Engine Data Sensors - Pressure, Temperature, MAF, VSS
Engine Controls Schematic Icons
Fuse Block - Underhood: LO SPD FAN, HI SPD FAN, V8 ECM, PRE 02/CAM and HFV6 ECM Fuses; Main, LO SPD, HI SPD and S/P FAN Relays
Fuse Block Underhood Bussing
Figure 6:

Engine Data Sensors - Electronic Throttle Controls


Object Number: 1619730  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Ignition Controls - Bank 1 Ignition Coils
Engine Data Sensors - Oxygen Sensors
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 7:

Ignition Controls - Bank 1 Ignition Coils


Object Number: 1619732  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Ignition Controls - Bank 2 Ignition Coils
Engine Data Sensors - Oxygen Sensors
Engine Controls Schematic Icons
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
G109, G112 (LY7)
Figure 8:

Ignition Controls - Bank 2 Ignition Coils


Object Number: 1619734  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Camshaft Position (CMP) Sensors and Solenoids
Engine Data Sensors - Electronic Throttle Controls
Engine Controls Schematic Icons
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
G109, G112 (LY7)
Figure 9:

Ignition Controls - CMP Sensors and Solenoids


Object Number: 1619735  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Ignition Controls - Crankshaft Position (CKP) and Knock Sensors
Ignition Controls - Bank 2 Ignition Coils
Engine Controls Schematic Icons
Fuse Block Underhood Bussing
Ignition Controls -Crankshaft Position (CKP) and Knock Sensors
Fuse Block Underhood LO SPD FAN, HI SPD FAN, V8 ECM, PRE 02/CAM and HFV6 ECM Fuses; Main, LO SPD, HI SPD and S/P FAN Relays
Engine Data Sensors - Low Reference Bus
Figure 10:

Ignition Controls - CKP, Knock Sensors and IMRC Solenoid


Object Number: 1619741  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - Fuel Pump and Injectors
Camshaft Position (CMP) Sensors and Solenoids
Engine Controls Schematic Icons
Engine Data Sensors - Low Reference Bus
Camshaft Position (CMP) Sensors and Solenoids
G107 (LH2), G113 (LY7)
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 11:

Fuel Controls - Fuel Pump and Injectors


Object Number: 1619742  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Ignition Controls - Crankshaft Position (CKP) and Knock Sensors
Engine Controls Schematic Icons
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
Fuse Block Underhood Bussing
G401 (1 of 2)
Fuse Block - Underhood: Odd INJ/COILS, Even INJ COILS and POST 02 Fuses
G401 (1 of 2)
Engine Oil and Fuel Tank Level
Figure 12:

Fuel Controls - EVAP Controls


Object Number: 1619743  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Fuel Controls - Fuel Pump and Injectors
Engine Controls Schematic Icons
Fuse Block - Underhood: LO SPD FAN, HI SPD FAN, V8 ECM, PRE 02/CAM and HFV6 ECM Fuses; Main, LO SPD, HI SPD and S/P FAN Relays
Fuse Block Right Rear Bussing
Fuse Block - Underhood: LO SPD FAN, HI SPD FAN, V8 ECM, PRE 02/CAM and HFV6 ECM Fuses; Main, LO SPD, HI SPD and S/P FAN Relays
Engine Data Sensors - Low Reference Bus
Engine Data Sensors - 5-Volt Reference Bus
Engine Data Sensors - Low Reference Bus
Figure 13:

Controlled/Monitored Subsystem References


Object Number: 1619744  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Fuel Controls - EVAP Controls
Engine Controls Schematic Icons
Starting System - LH2
06 STS Charging System
Cooling Fans
Shift Lock Control Schematics
Indicators
A/C Refrigerant Pressure Sensor and Compressor Clutch
Backup Lamps, CHMSL - Domestic and Export
TCM Power, Grounds and DLC