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

Module Power, Ground, Serial Data, and MIL


Object Number: 1801776  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5 Volt and Low Reference page 1 of 2
Fuse Block-Underhood B+ Bus
G115 (LY7)
Ignition Switch
Ignition Switch
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DIPSLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse
Ignition Switch
Data Link Connector (DLC) Schematics LY7
G115 (LY7)
Figure 2:

5-Volt and Low Reference - 1 of 2


Object Number: 1801796  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
5 Volt and Low Reference Page 2 of 2
Module Power, Ground, Serial Data, and MIL
Figure 3:

5-Volt and Low Reference - 2 of 2


Object Number: 1801804  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Pressure and Temperature Sensors
5 Volt and Low Reference page 1 of 2
Figure 4:

Pressure and Temperature Sensors


Object Number: 1801808  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
MAF, VSS, and Stop Lamp Switch
5 Volt and Low Reference Page 2 of 2
5 Volt and Low Reference Page 2 of 2
5 Volt and Low Reference Page 2 of 2
Figure 5:

MAF, VSS and Stop Lamp Switch


Object Number: 1801810  Size: FS
Master Electrical Component List
Air Intake System Description
Control Module References
Oxygen Sensors
Pressure and Temperature Sensors
Fuse Block-Underhood B+ Bus
Fuse Block-Underhood B+ Bus
Turn Signal, Hazard and Stop Lamps Outputs
Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses
Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses
Shift and TCC Solenoid Valves, TFT Sensor, and Stop Lamp Switch (LY7)
Data Active Brake and Stability
Object Detection Schematics
5 Volt and Low Reference page 1 of 2
Figure 6:

Oxygen Sensors


Object Number: 1801823  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
Electronic Throttle Controls
MAF, VSS, and Stop Lamp Switch
Fuse Block-Underhood B+ Bus
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses
Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 7:

Electronic Throttle Controls


Object Number: 1801824  Size: FS
Master Electrical Component List
Throttle Actuator Control (TAC) System Description
Control Module References
Ignition Controls - Bank 1 (Odd) Ignition Coils
Oxygen Sensors
Engine Controls Schematic Icons
Figure 8:

Ignition Controls - Bank 1 (Odd) Ignition Coils


Object Number: 1801868  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Ignition Controls - Bank 2 (Even) Ignition Coils
Electronic Throttle Controls
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
Figure 9:

Ignition Controls - Bank 2 (Even) Ignition Coils


Object Number: 1801870  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
Control Module References
Knock and CKP Sensors and Engine Speed
Ignition Controls - Bank 1 (Odd) Ignition Coils
Fuse Block-Underhood B+ Bus
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
Figure 10:

Ignition Controls - Knock and CKP Sensors and Engine Speed


Object Number: 1801871  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Control Module References
Ignition Controls - CMP Sensors and Solenoids
Ignition Controls - Bank 2 (Even) Ignition Coils
Data Active Brake and Stability
Engine Controls Schematic Icons
Engine Controls Schematic Icons
Figure 11:

Ignition Controls - CMP Sensors and Solenoids


Object Number: 1801874  Size: FS
Master Electrical Component List
Camshaft Actuator System Description
Control Module References
Fuel Controls - Fuel Pump and Injectors
Knock and CKP Sensors and Engine Speed
Fuse Block-Underhood B+ Bus
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
5 Volt and Low Reference Page 2 of 2
Figure 12:

Fuel Controls - Fuel Pump and Injectors


Object Number: 1801876  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
EVAP Controls
Ignition Controls - CMP Sensors and Solenoids
Fuse Block-Underhood B+ Bus
G115 (LY7)
Fuse Block-Underhood B+ Bus
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
Power, Ground, Serial Data, and Gages LY7
G115 (LY7)
G302
Figure 13:

EVAP Controls


Object Number: 1801877  Size: FS
Master Electrical Component List
Fuel System Description
Control Module References
Module References
Fuel Controls - Fuel Pump and Injectors
Fuse Block - Underhood BATT MAIN 1 Fuse
Fuse Block-Underhood B+ Bus
Fuse Block-Underhood B+ Bus
Power, Ground, Serial Data, and Gages LY7
Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7)
5 Volt and Low Reference page 1 of 2
Compressor Controls and Serial Data (LY7)
Compressor Controls and Serial Data (LY7)
Figure 14:

Module References


Object Number: 1801880  Size: FS
Master Electrical Component List
Engine Control Module Description
Control Module References
EVAP Controls
Compressor Controls and Serial Data (LY7)
Compressor Controls and Serial Data (LY7)
Engine Cooling Schematics
Data Active Brake and Stability
Starting - LY7
Charging
Indicators UH8
Cruise Control Schematics LY7
Internal Mode Switch (LY7)