Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2005CHEVY EXPRESS G3500, VAN PASSENGER, LQ4REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (ENGINE CONTROL SYSTEM - 4.3L - INTRODUCTION)COMPONENT LOCATORENGINE CONTROLS COMPONENT VIEWS
2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4
Engine Controls Component Views
2005 Chevrolet Chevy Express G3500, Van Passenger, LQ4SECTION Engine Controls Component Views
WARNING: This page is about a different variant/trim than selected.
| Callout | Component Name |
|---|---|
| 1 | Generator |
| 2 | A/C Compressor Clutch Connector (C60) |
| 3 | Crankshaft Position (CKP) Sensor Connector |
| Callout | Component Name |
|---|---|
| 1 | Central Sequential Fuel Injection (Central SFI) Connector |
| 2 | Manifold Air Pressure (MAP) Sensor Connector |
| 3 | Ignition Control Module (ICM) Connector |
| 4 | Generator Connector |
| 5 | S102 |
| 6 | Ignition Coil Connector |
| 7 | Evaporative Emission (EVAP) Canister Purse Solenoid Connector |
| Callout | Component Name |
|---|---|
| 1 | S101 |
| 2 | A/C Compressor Clutch Connector (C60) |
| 3 | Throttle Position (TP) Sensor Connector |
| 4 | Idle Air Control (IAC) Valve Connector |
| 5 | A/C High Pressure Switch Connector (C60) |
| Callout | Component Name |
|---|---|
| 1 | A/C High Pressure Switch Connector (C60) |
| 2 | Engine Coolant Temperature (ECT) Sensor Connector |
| Callout | Component Name |
|---|---|
| 1 | G102 |
| 2 | Camshaft Position (CMP) Sensor Connector |
| 3 | G103 |
| 4 | Engine Oil Pressure (EOP) Sensor Connector |
| 5 | Knock Sensor (KS) Connector |
| 6 | Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 Connector |
| Callout | Component Name |
|---|---|
| 1 | S101 |
| 2 | C109 |
| 3 | Powertrain Control Module (PCM) C1, C2 |
| 4 | Fuse Block Underhood - C6 |
| 5 | Fuse Block Underhood - C1 |
| 6 | Horn Assembly Connector |
| 7 | C100 |
| 8 | C101 |
| 9 | A/C Compressor Clutch Connector (C60) |
| Callout | Component Name |
|---|---|
| 1 | Blower Motor Resistor Assembly |
| 2 | Blower Motor |
| 3 | Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor |
| 4 | A/C Low Pressure Switch (C60) |
| Callout | Component Name |
|---|---|
| 1 | Heated Oxygen Sensor (HO2S) Bank 1 Sensor 1 |
| 2 | Heated Oxygen Sensor (HO2S) Bank 2 Sensor 1 |
| 3 | Heated Oxygen Sensor (HO2S) Bank 2 Sensor 2 |
| 4 | Heated Oxygen Sensor (HO2S) Bank 1 Sensor 2 |
| 5 | Park/Neutral Position (PNP) Switch |
| Callout | Component Name |
|---|---|
| 1 | Evaporative Emission (EVAP) Canister Vent Solenoid |
| 2 | Electronic Brake Control Module (EBCM) |
| Callout | Component Name |
|---|---|
| 1 | Fuel Pump and Sender Assembly Connector |
| 2 | Fuel Tank Pressure (FTP) Sensor Connector |
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.