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

Module Power, Ground, Serial Data and MIL (LY7)
Object Number: 2079745 Size: FS
Figure 2:

Engine Data Sensors - 5-Volt 1 and Low Reference (LY7)
Object Number: 2079747 Size: FS
Module Power, Ground, Serial Data and MIL
Figure 3:

Engine Data Sensors - 5-Volt 2 and Low Reference (LY7)
Object Number: 2079749 Size: FS
Figure 4:

Engine Data Sensors - Pressure, Temperature (LY7)
Object Number: 2079756 Size: FS
Figure 5:

Engine Data Sensors - Heated Oxygen Sensors (HO2S) (LY7)
Object Number: 2079762 Size: FS
Figure 6:

Engine Data Sensors - Accelerator Pedal Position (APP) and Throttle Controls (LY7)
Object Number: 2079766 Size: FS
Figure 7:

Ignition Controls - Ignition System Coils Bank 1 (LY7)
Object Number: 2079770 Size: FS
Figure 8:

Ignition Controls - Ignition System Coils Bank 2 (LY7)
Object Number: 2079773 Size: FS
Figure 9:

Ignition Controls - Crankshaft Position (CKP) and Knock (KS) Sensors (LY7)
Object Number: 2079777 Size: FS
Figure 10:

Ignition Controls - Camshaft Position (CMP) Sensors and Actuator Solenoids (LY7)
Object Number: 2079781 Size: FS
Figure 11:

Fuel Controls - Fuel Injectors (LY7)
Object Number: 2079786 Size: FS
Figure 12:

Fuel Controls - Fuel Pump Controls (LY7)
Object Number: 2079791 Size: FS
Figure 13:

Fuel Controls - Evaporative Emissions (EVAP) Controls (LY7)
Object Number: 2079794 Size: FS
Figure 14:

Controlled/Monitored Subsystem References (LY7)
Object Number: 2079797 Size: FS