GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2002 🢒 Century 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Engine Controls Component Views
Figure 1:

Lower Left Side of Engine (LG8)
Object Number: 822934 Size: MF
(1)A/C Compressor Clutch
(2)Crankshaft Position (CKP) Sensor A
(3)Knock Sensor (KS) 1
(4)Engine Oil Pressure (EOP) Switch
(5)Engine Wiring Harness
(6)Starter Lead
(7)Positive Battery Cable
Figure 2:

Lower Front of Engine
Object Number: 389009 Size: LF
(1)G113
(2)G100/G111
(3)Starter
(4)Knock Sensor (KS)
(5)Positive Battery Cable
(6)Fuse Link
(7)Engine Oil Pressure (EOP) Switch
Figure 3:

Left Side of Engine
Object Number: 400595 Size: LF
(1)Camshaft Position (CMP) Sensor
Figure 4:

Rear of Engine
Object Number: 388941 Size: LF
(1)Ignition Control Module (ICM) C3
(2)Ignition Control Module (ICM)
(3)Crankshaft Position (CKP) Sensor B
(4)Crankshaft Position (CKP) Sensor Wiring Harness
Figure 5:

Lower Right Side of Engine
Object Number: 388943 Size: LF
(1)Crankshaft Position (CKP) Sensor A
(2)Front Cover
Figure 6:

EVAP Canister -- LR Wheel Opening
Object Number: 305367 Size: LF
(1)Evaporative Emissions (EVAP) Canister
(2)Evaporative Emissions (EVAP) Canister Vent Solenoid
(3)P425
(4)Body Wiring Harness
Figure 7:

Top Left Side of Engine
Object Number: 374680 Size: LF
(1)Throttle Position (TP) Sensor
(2)Idle Air Control (IAC) Valve
(3)Exhaust Gas Recirculation (EGR) Valve
Figure 8:

Fuel Sender System
Object Number: 769961 Size: LF
(1)Fuel Tank Pressure (FTP) Sensor
(2)Fuel Line Quick Connector
(3)Fuel Pump
(4)Base Plate
(5)Fuel Strainer
(6)Fuel Level Sensor
(7)Springs
Figure 9:

Top Center Rear of Engine
Object Number: 374676 Size: LF
(1)Generator Connector
(2)Ignition Control Module (ICM), C2 Connector
(3)Heated Oxygen Sensor (HO2S) 1
(4)Ignition Control Module (ICM), C3 Connector
(5)Ignition Control Module (ICM), C1 Connector
Figure 10:

Heated Oxygen Sensor (HO2S) 2 -- Below Center of Vehicle
Object Number: 305319 Size: LF
(1)Exhaust Heat Shield
(2)Catalytic Converter
(3)Heated Oxygen Sensor (HO2S) 2
Figure 11:

Top Front of Engine
Object Number: 374674 Size: LF
(1)Mass Air Flow (MAF) Sensor
Figure 12:

Top Side of Engine (w/RPO LG8)
Object Number: 374679 Size: LF
(1)Manifold Absolute Pressure (MAP) Sensor
Figure 13:

Powertrain Control Module (PCM) - LH Side of Engine Compartment
Object Number: 305307 Size: LF
(1)Powertrain Control Module (PCM) Connector, C2
(2)Powertrain Control Module (PCM) Connector, C1
(3)Powertrain Control Module (PCM)
(4)Air Cleaner/PCM Housing
(5)Engine Wiring Harness
(6)G101
Figure 14:

Left Side of Engine Compartment (LG8)
Object Number: 826772 Size: LF
(1)Park/Neutral Position (PNP) Switch, C2
(2)Park/Neutral Position (PNP) Switch, C1
(3)Park/Neutral Position (PNP) Switch
(4)Electronic Brake Control Module (EBCM)
(5)C101
(6)A/C Refrigerant Pressure Sensor
(7)C171
(8)G113
Figure 15:

Right Rear of Engine
Object Number: 374682 Size: LF
(1)Vehicle Speed Sensor (VSS)
(2)Vehicle Speed Sensor (VSS) Connector