GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century (China) 🢒 Engine 🢒 Engine Controls - 2.5L (LB8) and 3.0L (L46) 🢒 Engine Controls Component Views
Figure 1:

Behind the Right Side of Radiator
Object Number: 623857 Size: LF
(1)Radiator
(2)Engine Coolant Level Indicator Module
Figure 2:

Behind Engine Cooling Fans / Radiator
Object Number: 619210 Size: LF
(1)C105 (Inline to Engine Coolant Fans)
(2)Radiator Fill Opening
(3)Powertrain Control Module (PCM) Connector, C1 (Clear)
(4)Powertrain Control Module (PCM) Connector, C2 (Blue)
Figure 3:

Left Front of Engine
Object Number: 619189 Size: LF
(1)Engine Oil Level Sensor
(2)Vehicle Speed Sensor (VSS)
(3)Crankshaft Position (7X) Sensor
Figure 4:

Front Right of Engine
Object Number: 619205 Size: LF
(1)Generator
(2)Ignition Control Module (ICM) Connector, C2
(3)Ignition Control Module (ICM) Connector, C3
(4)Heated Oxygen Sensor (H2OS) Pigtail
(5)Ignition Control Module (ICM) Connector, C2
(6)Mass Air Flow (MAF) Sensor
Figure 5:

Upper Right Front of Engine
Object Number: 619214 Size: LF
(1)Ignition Control Module (ICM) Connector, C2
(2)C102 (Inline to Fuel Injector Wiring Harness)
(3)Heated Oxygen Sensor (H2OS) Pigtail
(4)Heated Oxygen Sensor (H2OS)
(5)Ignition Control Module (ICM) Connector, C1
Figure 6:

Left Side of Engine
Object Number: 619207 Size: LF
(1)Engine Wiring Harness
Figure 7:

Top Left Rear of Engine
Object Number: 619200 Size: LF
(1)C102 (Fuel Injector Wiring Harness)
(2)Manifold Absolute pressure (MAP) Sensor
(3)Throttle position (TP) Sensor
(4)Idle Air Control (IAC) Valve
(5)Exhaust Gas Recirculation (EGR) Valve
(6)Evaporative Emission (EVAP) Purge Valve
(7)Crankshaft Position (CKP) Sensor (24X)
(8)Bank 1 Knock (KS) Sensor
(9)Engine Oil Pressure Indicator Switch
(10)Fusible Links (Engine Starter)
(11)A/C Compressor Clutch Coil
(12)Positive Crankcase Ventilation (PVC) Valve
(13)Camshaft Position (CMP) Sensor
Figure 8:

Upper Rear of Engine
Object Number: 619206 Size: LF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(2)Exhaust Gas Recirculation (EGR) Sensor
(3)Mass Air Flow (MAF) Sensor
(4)Throttle Position (TP) Sensor
(5)Idle Air Control (IAC) Valve
(6)Intake Air Temperature Sensor
Figure 9:

Lower Left of Engine
Object Number: 619208 Size: LF
(1)Bank 1 Knock Sensor (KS)
(2)Fusible Link (Starter B+ Therminal)
(3)Engine Oil Pressure Indicator Switch
(4)Starter Solenoid Lead
(5)Battery Cable (Positive)
(6)C172 (Inline to RF Wheel Speed Sensor)
(7)A/C Compressor Clutch Coil
(8)Crankshaft Position (CKP) Sensor (24X)
(9)Engine Coolant Level Indicator Module
(10)Underhood Accessory Wiring Junction Block Connector, C3
(11)Underhood Accessory Wiring Junction Block Connector, C7
Figure 10:

Lower Left Rear of Engine Compartment
Object Number: 491325 Size: LF
( 1)Engine (RPO LB8/L46)
(2)Automatic Transaxle (RPO M15)
Figure 11:

Left Side Of Transmission
Object Number: 327378 Size: LF
(1)Park/Neutral Position Switch
(2)Park/Neutral Position Switch, C1
(3)Park/Neutral Position Switch, C2
(4)Engine Wiring Harness
(5)C111 (Inline to Automatic Tranaxle From Engine Wiring Harness)
Figure 12:

Left Rear of Vehicle
Object Number: 619215 Size: LF
(1)Evaporative Emission (EVAP) Vent Solenoid Valve
(2)Fuel Tank