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

Module Power, Ground, Serial Data, and MIL


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Figure 2:

Engine Data Sensors - 5-Volt and Low Reference


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Figure 3:

Fuse Block - Underhood and IGN-A Relay


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Figure 4:

Engine Data Sensors - VSS


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Figure 5:

Engine Data Sensors - HO2S


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Figure 6:

Engine Data Sensors - Electronic Throttle Controls


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Figure 7:

Ignition Controls - Ignition Systems 1 of 2


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Figure 8:

Ignition Controls - Ignition Systems 2 of 2


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Figure 9:

Ignition System - CKP, CMP, and KS Sensors


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Figure 10:

Fuel Controls - Fuel Pump Controls


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Figure 11:

Fuel Controls - Fuel Injectors


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Figure 12:

Device Controls - EGR Valve


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Figure 13:

Controlled/Monitored Subsystem References


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