GM Service Manual Online
For 1990-2009 cars only
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Figure 1:

Module Power, Ground, Serial Data and MIL
Object Number: 2080420 Size: FS
Figure 2:

Engine Data Sensors - 5-Volt and Low References (1 of 2)
Object Number: 2080425 Size: FS
Figure 3:

Engine Data Sensors - 5-Volt and Low References (2 of 2)
Object Number: 2080435 Size: FS
Figure 4:

Engine Data Sensors - Temperature, AI and MAF
Object Number: 2080439 Size: FS
Figure 5:

Engine Data Sensors - Pressure and WIF
Object Number: 2080442 Size: FS
Figure 6:

Engine Data Sensors - EGR and Turbocharger Controls
Object Number: 2080445 Size: FS
Figure 7:

Engine Data Sensors - Pedal Position and Injector Timing
Object Number: 2080449 Size: FS
Figure 8:

Engine Data Sensors - Glow Plug Controls and Intake Air Heater
Object Number: 2080452 Size: FS
Figure 9:

Fuel Controls - Fuel Pump, Temperature and Pressure Controls
Object Number: 2080456 Size: FS
Figure 10:

Fuel Controls - Fuel Injectors
Object Number: 2080461 Size: FS
Figure 11:

Controlled/Monitored Subsystem References
Object Number: 2080465 Size: FS