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

Module Power, Ground, Serial Data, and MIL
Object Number: 2081575 Size: FS
Figure 2:

5-Volt and Low Reference
Object Number: 2081583 Size: FS
Figure 3:

Engine Data Sensors - Pressure, Temperature, and Throttle Control
Object Number: 2081585 Size: FS
Figure 4:

Engine Data Sensors - HO2S
Object Number: 2081588 Size: FS
Figure 5:

Ignition Controls - Ignition System Coils 1, 3, 5, and 7
Object Number: 2081591 Size: FS
Figure 6:

Ignition Controls - Ignition System Coils 2, 4, 6, and 8
Object Number: 2081594 Size: FS
Figure 7:

Ignition Controls - Sensors
Object Number: 2081596 Size: FS
Figure 8:

Fuel Controls - Fuel Injectors and Fuel Pump Controls
Object Number: 2081598 Size: FS
Figure 9:

Fuel Controls - EVAP Controls
Object Number: 2081601 Size: FS
Figure 10:

Monitored/Controlled Subsystem References
Object Number: 2081603 Size: FS