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

Module Power, Ground, Serial Data, and MIL


Object Number: 1967475  Size: FS
Figure 2:

5-Volt and Low Reference


Object Number: 1967476  Size: FS
Figure 3:

Engine Data Sensors - Pressure, Temperature, and Throttle Control


Object Number: 1967477  Size: FS
Figure 4:

Engine Data Sensors - HO2S


Object Number: 1967482  Size: FS
Figure 5:

Ignition Controls - Ignition System Coils 1, 3, 5, and 7


Object Number: 1967488  Size: FS
Figure 6:

Ignition Controls - Ignition System Coils 2, 4, 6, and 8


Object Number: 1967493  Size: FS
Figure 7:

Ignition Controls - Sensors


Object Number: 1967494  Size: FS
Figure 8:

Fuel Controls - Fuel Injectors, and Fuel Pump Controls


Object Number: 1967495  Size: FS
Figure 9:

Fuel Controls - EVAP Controls


Object Number: 1967496  Size: FS
Figure 10:

Monitored/Controlled Subsystem References


Object Number: 1967497  Size: FS