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 MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.8L, 5.3L, OR 6.0L - INTRODUCTION (2 OF 2)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Engine Control System & Fuel System - 4.8L, 5.3L, Or 6.0L - Introduction (2 Of 2)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Engine Control System & Fuel System - 4.8L, 5.3L, Or 6.0L - Introduction (2 Of 2)
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Repair Instructions
- Engine Control Module Replacement
- Crankshaft Position Variation Learn
- Throttle or Idle Learn
- Engine Coolant Temperature Sensor Replacement
- Mass Airflow Sensor/Intake Air Temperature Sensor Replacement
- Manifold Absolute Pressure Sensor Replacement
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 1
- Heated Oxygen Sensor Replacement - Bank 1 Sensor 2
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 1
- Heated Oxygen Sensor Replacement - Bank 2 Sensor 2
- Accelerator Pedal Position Sensor Replacement
- Throttle Body Assembly Replacement
- Throttle Body Cleaning
- Fuel Pressure Gage Installation and Removal
- Fuel Pressure Relief (With CH 48027)
- Fuel Pressure Relief (Without CH 48027)
- Metal Collar Quick Connect Fitting Service
- Plastic Collar Quick Connect Fitting Service
- Fuel Pump Flow Control Module Replacement
- Fuel Tank Draining (L59)
- Fuel Tank Draining (w/o L59)
- Fuel Tank Filler Pipe Replacement (with LH Door)
- Fuel Tank Filler Pipe Replacement (without LH Door)
- Fuel Tank Filler Pipe Replacement (with Rear Tank)
- Fuel Tank Replacement (Passenger/Cargo)
- Fuel Tank Replacement (Cutaway Van Side Tank)
- Fuel Tank Replacement (Cutaway Van Rear Tank)
- Fuel Tank Pressure Sensor Replacement (Single)
- Fuel Tank Pressure Sensor Replacement (Dual Tank)
- Fuel Tank Fuel Pump Module Replacement
- Fuel Level Sensor Replacement
- Fuel Hose/Pipes Assembly Replacement (Passenger/Cargo Van Fuel Tank Pipes)
- Fuel Hose/Pipes Assembly Replacement (Cutaway Van Rear Tank Fuel Tank Pipe)
- Fuel Hose/Pipes Assembly Replacement (Cutaway Van Side Tank)
- Fuel Hose/Pipes Replacement - Chassis (Cutaway Van - Rear Tank)
- Fuel Hose/Pipes Replacement - Chassis (Cutaway Van - Side Tank)
- Fuel Hose/Pipes Replacement - Chassis (Cargo/Passenger Van)
- Fuel Pressure Sensor Replacement
- Fuel System Cleaning
- Fuel Injection Fuel Rail Assembly Replacement
- Fuel Injection Fuel Rail Crossover Tube Replacement
- Fuel Injector Replacement
- Fuel Injector Cleaning
- Evaporative Emission Canister Purge Solenoid Valve Replacement
- Evaporative Emission Canister Vent Solenoid Valve Replacement
- Evaporative Emission System Hoses/Pipes Replacement
- Evaporative Emission Hoses/Pipes Replacement - Chassis/Canister
- Evaporative Emission Hoses/Pipes Replacement - Engine/Chassis
- Evaporative Emission Canister Replacement (Passenger/Cargo Van)
- Evaporative Emission Canister Replacement (Cutaway Van)
- Evaporative Emission System Cleaning
- Ignition Coil Replacement
- Spark Plug Wire Inspection
- Spark Plug Wire Replacement
- Gas Engine Ignition Spark Plug Inspection
- Gas Engine Ignition Spark Plug Replacement
- Crankshaft Position Sensor Replacement
- Camshaft Position Sensor Replacement
- Knock Sensor 1 Replacement
- Knock Sensor 2 Replacement
- Air Cleaner Element Replacement
- Air Cleaner Assembly Replacement
- Air Cleaner Resonator Outlet Duct Replacement
- Description and Operation
- Engine Control Module Description
- Throttle Actuator Control (TAC) System Description
- Camshaft Actuator System Description
- Fuel System Description
- Fuel System Overview
- E85 Flex Fuel Description
- Switching Between Gasoline and E85
- Fuel Pump Control Module (FPCM) - LMF
- Electronic Returnless Fuel System (ERFS) - LMF
- Liquid Fuel Pressure Sensor - With FPCM
- Fuel Tanks
- Fuel Fill Pipe
- Fuel Filler Cap
- Fuel Sender Assembly
- Fuel Level Sensor
- Fuel Pump
- Fuel Strainer
- Fuel Filter
- Nylon Fuel Pipes
- Quick-Connect Fittings
- On-Board Refueling Vapor Recovery System (ORVR)
- Fuel Pipe O-Rings
- Fuel Rail Assembly
- Fuel Injectors
- Fuel Pressure Regulator
- Fuel Metering Modes of Operation
- Fuel Trim
- Evaporative Emission Control System Description
- Electronic Ignition (EI) System Description
- Special Tools and Equipment
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
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Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.