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: 2081430 Size: FS
Figure 2:

5-Volt and Low Reference
Object Number: 2081434 Size: FS
Figure 3:

Engine Data Sensors - Pressure and Temperature
Object Number: 2081436 Size: FS
Figure 4:

Engine Data Sensors - Electronic Throttle Controls
Object Number: 2081440 Size: FS
Figure 5:

Engine Data Sensors - HO2S
Object Number: 2081442 Size: FS
Figure 6:

Ignition Controls - CKP, CMP, and Knock Sensors
Object Number: 2081446 Size: FS
Figure 7:

Fuel Controls - Fuel Injectors and Fuel Pump Controls
Object Number: 2081449 Size: FS
Figure 8:

Fuel Controls - EVAP, EGR, and FTP Controls
Object Number: 2081452 Size: FS
Figure 9:

AIR Controls (NU6)
Object Number: 2081454 Size: FS
Figure 10:

Monitored/Controlled Subsystem References
Object Number: 2081534 Size: FS
Figure 11:

Automatic Transmission Control References
Object Number: 2081543 Size: FS