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

Module Power, Ground, Serial Data, and MIL


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Figure 2:

5-Volt and Low Reference


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Figure 3:

Engine Data Sensors - Pressure, Temperature, and Throttle Controls


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Figure 4:

Engine Data Sensors - Heated Oxygen Sensors


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Figure 5:

Ignition Controls - Ignition System


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Figure 6:

Ignition Controls - Sensors/Actuators


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Figure 7:

Fuel Controls - Fuel Injectors and Fuel Pump Controls


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Figure 8:

Fuel Controls - EVAP Controls


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Figure 9:

EGR, Secondary Air Injection (AIR)


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Figure 10:

Monitored/Controlled Subsystem References


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