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

Power, Ground, MIL and DLC


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Figure 2:

Engine Data Sensors - 5V Reference Bussing


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Figure 3:

Engine Data Sensors - Pressure, Temp and MAF/IAT


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Figure 4:

Engine Data Sensors - HO2S


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Figure 5:

Engine Data Sensors - APP and Throttle Body Assembly


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Figure 6:

Ignition Controls 1 of 2


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Figure 7:

Ignition Controls 2 of 2


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Figure 8:

Fuel Controls


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Figure 9:

CKP, CMP, Knock Sensors


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Figure 10:

EVAP Controls, FTP Sensor


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Figure 11:

EGR, Secondary Air Injection (AIR)


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Figure 12:

Controlled and Monitored Subsystem References


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