Engine Electrical Component Views

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Harness Jumper to Engine POA Harness Diesel

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Battery - Right
2	Fuse Holder - Underhood
3	X127
4	X108
5	X107
6	X123 (PTO)
7	Fuse Block - Underhood
8	X109
9	Battery - Left (6A6/TP2)
10	Engine Control Module (ECM)
11	Transmission Control Module (TCM)

Fig 2: Front of Engine Compartment (4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Battery Current Sensor
2	Mega Fuse
3	A/C Low Pressure Switch (C67/CJ2)
4	Fuse Block - Underhood
5	Engine Control Module (ECM)
6	A/C Refrigerant Pressure Sensor (C67/CJ2)
7	Mass Airflow (MAF)/Intake Air Temperature (IAT) Sensor
8	Battery - Right

Fig 3: Front of the Engine (Gas - 4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Throttle Body
2	Manifold Absolute Pressure (MAP) Sensor
3	Evaporative Emission (EVAP) Canister Purge Solenoid Valve
4	Knock Sensor (KS) - 1
5	Engine Block Heater
6	Engine Coolant Temperature (ECT) Sensor
7	Camshaft Position (CMP) Sensor
8	Generator

Fig 4: Auxiliary Battery Harness (TP2)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Fuse Holder - Underhood
2	Run Relay
3	Auxiliary Battery Harness
4	Auxiliary Battery Relay
5	X122

Fig 5: Top of Engine Diesel

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Turbocharger Vane Position Control Solenoid Valve
2	Glow Plug Control Module (GPCM)
3	Fuel Rail Temperature (FRT) Sensor
4	Intake Air Temperature (IAT) Sensor 2 Connector
5	Fuel Pressure Regulator Connector
6	A/C Refrigerant Pressure Sensor (C67/CJ2)
7	Generator - Left (K76)
8	A/C Compressor Clutch (C67/CJ2)
9	Engine Coolant Temperature (ECT) Sensor 1
10	Engine Coolant Temperature (ECT) Sensor 2
11	Camshaft Position (CMP) Sensor
12	X127
13	Generator - Right
14	Manifold Absolute Pressure (MAP) Sensor
15	Intake Air Heater (IAH) Module
16	Intake Air Temperature (IAT) Sensor 2
17	Fuel Heater
18	A/C Low Pressure Switch (C67/CJ2)

Fig 6: Left Side of Engine (4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Generator
2	Throttle Body
3	Transmission
4	Park/Neutral Position (PNP) Switch
5	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2
6	Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1
7	Knock Sensor (KS) - 1
8	Engine Coolant Temperature (ECT) Sensor
9	A/C Compressor Clutch (C67/CJ2)

Fig 7: Right Side of Engine (4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Evaporative Emission (EVAP) Canister Purge Solenoid Valve
2	Throttle Body
3	Mass Air Flow (MAF) / Intake Air Temperature (IAT) Sensor
4	Camshaft Position (CMP) Sensor
5	G103
6	Crankshaft Position (CKP) Sensor
7	Knock Sensor (KS) - 2
8	Starter
9	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1
10	Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2
11	Vehicle Speed Sensor (VSS)

Fig 8: Right Side of the Engine (Gas -4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Ignition Coil 8
2	Ignition Coil 6
3	Ignition Coil 4
4	Manifold Absolute Pressure (MAP) Sensor
5	Throttle Body
6	Ignition Coil 2
7	Knock Sensor (KS) - 2
8	Crankshaft Position (CKP) Sensor
9	Engine Oil Level Switch
10	Starter
11	Valve Lifter Oil Manifold (VLOM) Assembly
12	Engine Oil Pressure Sensor

Fig 9: Right Side of Engine (Diesel)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Fuel Injector 7
2	Fuel Injector 5
3	Fuel Injector 3
4	Exhaust Gas Recirculation (EGR) Valve
5	Fuel Injector 1
6	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor
7	Intake Air Valve
8	Crankshaft Position (CKP) Sensor
9	Glow Plug 1
10	G103
11	G105
12	Block Heater
13	Glow Plug 3
14	Glow Plug 5
15	Water In Fuel Sensor
16	Starter
17	Glow Plug 7

Fig 10: Right Rear Of The Engine Compartment (Gas -4.3L)

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
1	Battery - Right
2	A/C Low Pressure Switch (C67/CJ2)
3	A/C Compressor Clutch (C67/CJ2)
4	A/C Refrigerant Pressure Sensor (C67/CJ2)
5	Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor