GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2009 🢒 Sierra - 4WD 🢒 Power and Signal Distribution 🢒 Data Communications 🢒 Engine Controls Schematics
Figure 1:

Module Power, Ground and Serial Data
Object Number: 2064741 Size: FS
Figure 2:

5-Volt and Low Reference
Object Number: 2064744 Size: FS
Figure 3:

Engine Data Sensors - Pressure and Temperature
Object Number: 2064746 Size: FS
Figure 4:

Engine Data Sensors - Heated Oxygen Sensors
Object Number: 2064833 Size: FS
Figure 5:

Engine Data Sensors - Throttle Controls
Object Number: 2064835 Size: FS
Figure 6:

Ignition Controls - Ignition System Coils 1, 3, 5 and 7
Object Number: 2064837 Size: FS
Figure 7:

Ignition Controls - Ignition System Coils 2, 4, 6 and 8
Object Number: 2064839 Size: FS
Figure 8:

Ignition Controls - Sensors
Object Number: 2064841 Size: FS
Figure 9:

Fuel Pump Controls (except LY6)
Object Number: 2064843 Size: FS
Figure 10:

Fuel Pump Controls (LY6)
Object Number: 2064845 Size: FS
Figure 11:

Fuel Controls - Fuel Injectors
Object Number: 2064847 Size: FS
Figure 12:

Fuel Controls - EVAP Controls
Object Number: 2064849 Size: FS
Figure 13:

Controlled/Monitored Subsystem References
Object Number: 2064851 Size: FS