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

Module Power, Ground and Serial Data
Object Number: 2034136 Size: FS
Figure 2:

Engine Data Sensors - 5-Volt and Low Reference
Object Number: 2034152 Size: FS
Figure 3:

Engine Data Sensors - Pressure and Temperature
Object Number: 2034135 Size: FS
Figure 4:

Engine Data Sensors - Throttle Controls
Object Number: 2073139 Size: FS
Figure 5:

Engine Data Sensors - Oxygen Sensors


Object Number: 2034155 Size: FS
Figure 6:

Ignition Controls - Ignition System Coils 1, 3, 5, and 7
Object Number: 2073141 Size: FS
Figure 7:

Ignition Controls - Ignition System Coils 2, 4, 6, and 8
Object Number: 2073143 Size: FS
Figure 8:

Ignition Controls - Sensors
Object Number: 2073146 Size: FS
Figure 9:

Fuel Controls - Fuel Injectors
Object Number: 2073177 Size: FS
Figure 10:

Fuel Controls - Fuel Pump and EVAP Controls
Object Number: 2073159 Size: FS
Figure 11:

Controlled/Monitored Subsystem References
Object Number: 2073197 Size: FS