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

Power to the PCM and Ignition Switch Circuits


Object Number: 397471  Size: FS
Master Electrical Component List
Powertrain Control Module Description
Ignition Control Modules
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
Battery Feed to the Fuse Block-Underhood
IGN SW Fuse (Fuse Block-Rear)
G100 and G102, L47
Serial Data Class 2
Figure 2:

Ignition Control Modules


Object Number: 397477  Size: FS
Master Electrical Component List
Electronic Ignition (EI) System Description
PCM Inputs
Power to the PCM and Ignition Switch Circuits
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
Figure 3:

PCM Inputs


Object Number: 397474  Size: FS
Master Electrical Component List
Knock Sensor (KS) System Description
Fuel Pump and Sender Assembly and Controls
Ignition Control Modules
OBD II Symbol Description Notice
L47 IGN 1, OXY SEN, DIS Fuses and IGN 1 Relay (Fuse Block-Underhood)
Battery Feed to the Fuse Block-Underhood
Traction Control (w/NW9) and Variable Effort Steering (w/NV8)
Sensors
Figure 4:

Fuel Pump and Sender Assembly and Controls


Object Number: 397466  Size: FS
Master Electrical Component List
Fuel System Description
Fuel Injectors
PCM Inputs
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Rear
G302
G401 (1 of 2)
G302
Gauges
Figure 5:

Fuel Injectors


Object Number: 397452  Size: FS
Master Electrical Component List
Fuel System Description
Powertrain Control Module Description
Sensors
Fuel Pump and Sender Assembly and Controls
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
Figure 6:

Sensors


Object Number: 397467  Size: FS
Master Electrical Component List
Powertrain Control Module Description
EVAP Vent Valve, EVAP Purge Solenoid, and EGR Valve
Fuel Injectors
OBD II Symbol Description Notice
Gauges
Gauges
Figure 7:

EVAP Vent Valve, EVAP Purge Solenoid, and EGR Valve


Object Number: 397463  Size: FS
Master Electrical Component List
Exhaust Gas Recirculation (EGR) System Description
Oxygen Sensors
Sensors
OBD II Symbol Description Notice
L47 IGN 1, OXY SEN, DIS Fuses and IGN 1 Relay (Fuse Block-Underhood)
Battery Feed to the Fuse Block-Rear
L47 IGN 1, OXY SEN, DIS Fuses and IGN 1 Relay (Fuse Block-Underhood)
Battery Feed to the Fuse Block-Underhood
Battery Feed to the Fuse Block-Underhood
Figure 8:

Oxygen Sensors


Object Number: 815441  Size: FS
Master Electrical Component List
Air Intake System Description
MAF Sensor and IAC Valve
EVAP Vent Valve, EVAP Purge Solenoid, and EGR Valve
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
Figure 9:

MAF Sensor and IAC Valve


Object Number: 397454  Size: FS
Master Electrical Component List
Air Intake System Description
AIR Pump Relays and Motors
Oxygen Sensors
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
G100 and G102, L47
Figure 10:

AIR Pump Relays and Motors


Object Number: 397478  Size: FS
Master Electrical Component List
Secondary Air Injection System Description
Single Air Pump System
MAF Sensor and IAC Valve
OBD II Symbol Description Notice
Battery Feed to the Fuse Block-Underhood
Battery Feed to the Fuse Block-Underhood
L47 IGN 1, OXY SEN, DIS Fuses and IGN 1 Relay (Fuse Block-Underhood)
Figure 11:

Single Air Pump System


Object Number: 652008  Size: FS
Master Electrical Component List
Secondary Air Injection System Description
PCM Controls (1 of 2)
AIR Pump Relays and Motors
OBD II Symbol Description Notice
L47 IGN 1, OXY SEN, DIS Fuses and IGN 1 Relay (Fuse Block-Underhood)
Battery Feed to the Fuse Block-Underhood
Battery Feed to the Fuse Block-Underhood
Figure 12:

PCM Controls (1 of 2)


Object Number: 689750  Size: FS
Master Electrical Component List
Powertrain Control Module Description
PCM Controls (2 of 2)
Single Air Pump System
OBD II Symbol Description Notice
Cooling Fans and Relays
Compressor Control W/L47 (V8)
Indicators
Starter Solenoid Controls
CCM, PCM Controls and Vehicle Speed Input
Figure 13:

PCM Controls (2 of 2)


Object Number: 689751  Size: FS
Master Electrical Component List
Powertrain Control Module Description
PCM Controls (1 of 2)
OBD II Symbol Description Notice
Transmission Controls
Internal Mode Switch Inputs
Transmission Inputs