GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2009 🢒 Enclave 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Engine Controls Schematics
Figure 1:

Module Power, Ground, Serial Data, and MIL
Object Number: 2077843 Size: FS
Figure 2:

5-Volt 1 and Low Reference Bus
Object Number: 2077846 Size: FS
Figure 3:

5-Volt 2, 5-Volt 3, and Low Reference Busses
Object Number: 2077847 Size: FS
Figure 4:

Engine Data Sensors - Pressure, Temperature, and Throttle Controls
Object Number: 2077852 Size: FS
Figure 5:

Engine Data Sensors - Oxygen Sensors
Object Number: 2077854 Size: FS
Figure 6:

Ignition Controls - Bank 1 Ignition System
Object Number: 2077859 Size: FS
Figure 7:

Ignition Controls - Bank 2 Ignition System
Object Number: 2077862 Size: FS
Figure 8:

Ignition Controls - CKP/CMP/KS Sensors and CMP Actuator Solenoids
Object Number: 2077869 Size: FS
Figure 9:

Fuel Controls - Fuel Injectors
Object Number: 2077870 Size: FS
Figure 10:

Fuel Controls - Fuel Pump Flow Control
Object Number: 2090426 Size: FS
Figure 11:

Fuel Controls - EVAP Controls
Object Number: 2077871 Size: FS
Figure 12:

Subsystem References
Object Number: 2077875 Size: FS