GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Lucerne 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Engine Controls Schematics
Figure 1:

Module Power, Ground, Serial Data, and MIL
Object Number: 2081300 Size: FS
Figure 2:

5-Volt and Low Reference
Object Number: 2081303 Size: FS
Figure 3:

Engine Data Sensors - Pressure, Temperature, and Throttle Controls
Object Number: 2081305 Size: FS
Figure 4:

Engine Data Sensors - Heated Oxygen Sensors
Object Number: 2081309 Size: FS
Figure 5:

Ignition Controls - Ignition System
Object Number: 2081311 Size: FS
Figure 6:

Ignition Controls - Sensors/Actuators
Object Number: 2081316 Size: FS
Figure 7:

Fuel Controls - Fuel Injectors and Fuel Pump Controls
Object Number: 2081319 Size: FS
Figure 8:

Fuel Controls - EVAP Controls
Object Number: 2081321 Size: FS
Figure 9:

EGR, Secondary Air Injection (AIR)
Object Number: 2081324 Size: FS
Figure 10:

Monitored/Controlled Subsystem References
Object Number: 2081324 Size: FS