Powertrain Component Views

Fig 1: View Of EVAP Purge Solenoid & EGR Valve (LD8/L37)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Evaporative Emission (EVAP) Canister Purge Solenoid Valve
2	Exhaust Gas Recirculation (EGR) Valve

Fig 2: View Of HO2S Sensor 2 (Post HO2)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Heated Oxygen Sensor (HO2S) 2

Fig 3: View Of Secondary Air Injection (AIR) Pump (LD8/L37 with NU6)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Secondary Air Injection (AIR) Pump

Fig 4: Identifying Internal Electronic Component Locations 4T65E

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Pressure Control (PC) Solenoid Valve Assembly
2	1-2, 3-4 Shift Solenoid (SS) Valve Assembly
3	Automatic Transmission Input Shaft Speed (A/T ISS) Sensor Assembly
4	2-3 Shift Solenoid (SS) Valve Assembly
5	Lever Assembly-Manual Shaft Detent with Shift Position Switch - Internal Mode Switch (IMS)
6	Vehicle Speed Sensor (VSS) Assembly
7	Transmission Fluid Pressure (TFP) Manual Valve Position Switch Assembly
8	Transmission Fluid Temperature (TFT) Sensor
9	Torque Converter Clutch Pulse Width Modulation (TCC PWM) Solenoid Valve Assembly

Fig 5: Locating Secondary Air Injection (AIR) Check Valve (NU6)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Secondary Air Injection (AIR) Check Valve (NU6)

Fig 6: Locating Left Front Corner Of Engine Compartment Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
2	Engine Control Module (ECM) (LD8/L37), Powertrain Control Module (PCM) (L26), in the Air Cleaner Assembly

Fig 7: Electronic Component Views 4T80E

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
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

Fig 8: Top of Engine (L37/LD8) Component Views

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
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

Fig 9: Front of Engine (L37/LD8) Component Views

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
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

Fig 10: View Of Rear Of Engine (L37/LD8)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
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

Fig 11: View Of Left Side Of Engine (LD8/L37)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Engine - 4.6L
2	A/C Compressor Clutch
3	Generator
4	G110

Fig 12: Identifying G112, G114 & G115 (LD8/L37)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Exhaust Manifold
2	G114
3	G112
4	G115

Fig 13: View Near Rear Cylinder Head (LD8/L37)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Exhaust Gas Recirculation (EGR) Valve
2	Valve Cover
3	G100
4	Engine Coolant Temperature (ECT) Sensor

Fig 14: Identifying Heated Oxygen Sensors (LZ9/LZ4)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 2
2	Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 2

Fig 15: Identifying Engine Control Components (Front of Engine LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Intake Manifold Tuning (IMT) Valve Solenoid
2	Evaporative Emission (EVAP) Canister Purge Solenoid Valve
3	Throttle Body
4	Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 1
5	Knock Sensor (KS) 2
6	Starter Solenoid
7	Starter Motor
8	Engine Oil Pressure (EOP) Sensor
9	Camshaft Position (CMP) Actuator Solenoid Valve
10	Camshaft Position (CMP) Sensor

Fig 16: Identifying Mass Air Flow Intake Air Temperature Sensor (LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor

Fig 17: Identifying Fuel Injector Components (LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Fuel Injector 1
2	Fuel Injector 3
3	Fuel Injector 5
4	Fuel Rail
5	Fuel Injector 6
6	Fuel Injector 4
7	Fuel Injector 2

Fig 18: View Of Lower Left Front of Engine (LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Engine Oil Pressure (EOP) Sensor
2	Starter Motor
3	Starter Solenoid
4	Knock Sensor (KS) 2

Fig 19: Identifying Engine Control Components (Rear of Engine) (LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Throttle Body
2	Manifold Absolute Pressure (MAP) Sensor
3	Ignition Control Module (ICM)
4	Heated Oxygen Sensor (HO2S) - Bank 2 Sensor 1
5	Knock Sensor (KS) 2
6	Block Heater
7	Crankshaft Position (CKP) Sensor
8	Engine Oil Level Sensor
9	Starter Motor
10	Engine Coolant Temperature (ECT) Sensor

Fig 20: Identifying Top Rear of Engine Components (LZ9)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Manifold Absolute Pressure (MAP) Sensor
2	Generator
3	Heated Oxygen Sensor (HO2S) - Bank 1 Sensor 1
4	Ignition Control Module (ICM)
5	Exhaust Gas Recirculation (EGR) Valve
6	Evaporative Emission (EVAP) Canister Purge Solenoid Valve
7	Throttle Body