GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2009 🢒 TrailBlazer - 4WD 🢒 Diagnostic Navigation 🢒 Vehicle Diagnostic Information 🢒 Engine Controls Schematics
Figure 1:

Module Power, Ground, Serial Data, and MIL
Object Number: 2081721 Size: FS
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference
Object Number: 2081731 Size: FS
Figure 3:

Engine Data Sensors - MAF, Pressure, Temperature, and VSS
Object Number: 2081735 Size: FS
Figure 4:

Engine Data Sensors - Oxygen Sensors
Object Number: 2081738 Size: FS
Figure 5:

Engine Data Sensors - Throttle Actuator Controls
Object Number: 2081740 Size: FS
Figure 6:

Ignition Controls - Ignition Coils 1, 3, 5, and 7
Object Number: 2081743 Size: FS
Figure 7:

Ignition Controls - Ignition Coils 2, 4, 6, and 8
Object Number: 2081745 Size: FS
Figure 8:

Ignition Controls - Sensors and DOD Controls
Object Number: 2081747 Size: FS
Figure 9:

Fuel Controls - Fuel Pump and Fuel Injectors
Object Number: 2081750 Size: FS
Figure 10:

Fuel Controls - FTP Sensor and EVAP Controls
Object Number: 2081752 Size: FS
Figure 11:

Controlled/Monitored Subsystem References
Object Number: 2081755 Size: FS