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

EVAP Purge Solenoid and EGR Valve (LD8/L37)
Object Number: 1978241 Size: MF
(1)Evaporative Emission (EVAP) Canister Purge Solenoid Valve
(2)Exhaust Gas Recirculation (EGR) Valve
Figure 2:

HO2S Sensor 2 (Post HO2)
Object Number: 1978244 Size: SF
(1)Heated Oxygen Sensor (HO2S) 2
Figure 3:

Starter and Generator Harness
Object Number: 1619133 Size: LF
(1)Valve Cover
(2)X161
(3)Starter Motor
(4)Generator Terminal
(5)Generator Inline Fuse (V4U)
Figure 4:

G112, G114, and G115 (LD8/L37)
Object Number: 1707088 Size: LF
(1)Exhaust Manifold
(2)G114
(3)G112
(4)G115
Figure 5:

Secondary Air Injection (AIR) Pump
Object Number: 833366 Size: LF
(1)Secondary Air Injection (AIR) Pump
Figure 6:

Rear of Engine Compartment, on the Top Rear of the Engine
Object Number: 893836 Size: MF
(1)Secondary Air Injection (AIR) Check Valve (NU6)
Figure 7:

Left Front Corner of the Engine Compartment
Object Number: 893598 Size: MF
(1)Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
(2)Engine Control Module (ECM), in the Air Cleaner Assembly
Figure 8:

Electronic Component Views 4T80E
Object Number: 1978248 Size: LF
(1)Torque Converter Clutch Pulse Width Modulated (TCC PWM) Solenoid Valve
(2)Pressure Control Solenoid (PCS) Valve
(3)Automatic Transmission Input (Shaft) Speed Sensor (ISS)
(4)Vehicle Speed Sensor (VSS)
(5)1-2 and 2-3 Shift Solenoid (1-2 SS) (2-3 SS) Valves
(6)Internal Mode Switch (IMS)
(7)Automatic Transmission Fluid Temperature (TFT) Sensor
Figure 9:

Top of the Engine (L37/LD8)
Object Number: 1657280 Size: LF
(1)Starter Motor
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Throttle Body Assembly
(4)Fuel Injector 8
(5)Ignition Coil/Module 8
(6)Fuel Injector 6
(7)Ignition Coil/Module 6
(8)Knock Sensor (KS) 2
(9)Fuel Injector 4
(10)Ignition Coil/Module 4
(11)Ignition Coil/Module 2
(12)Fuel Injector 2
(13)Crankshaft Position (CKP) Sensor
(14)Knock Sensor (KS) 1
(15)Camshaft Position (CMP) Sensor
(16)Ignition Coil/Module 1
(17)Ignition Coil/Module 3
(18)Fuel Injector 1
(19)Ignition Coil/Module 5
(20)Fuel Injector 3
(21)Ignition Coil/Module 7
(22)Fuel Injector 5
(23)Fuel Injector 7
Figure 10:

Front of the Engine (L37/LD8)
Object Number: 1657286 Size: LF
(1)Valve Cover
(2)Ignition Coil/Module 2
(3)Ignition Coil/Module 4
(4)Ignition Coil/Module 6
(5)Ignition Coil/Module 8
(6)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
(7)Engine Oil Pressure (EOP) Switch
Figure 11:

Rear of the Engine (L37/LD8)
Object Number: 1657287 Size: LF
(1)Throttle Body Assembly
(2)Manifold Absolute Pressure (MAP) Sensor
(3)Valve Cover
(4)Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
(5)Engine Coolant Temperature (ECT) Sensor
(6)Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
Figure 12:

Left Side of Engine (LD8/L37)
Object Number: 1978253 Size: LF
(1)Engine - 4.6L
(2)A/C Compressor Clutch
(3)Generator
(4)G110
Figure 13:

Near the Rear Cylinder Head (LD8/L37)
Object Number: 1707093 Size: LF
(1)Exhaust Gas Recirculation (EGR) Valve
(2)Valve Cover
(3)G100
(4)Engine Coolant Temperature (ECT) Sensor