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 DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 537 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.8L, 5.3L OR 6.0L - INTRODUCTION)
2008 Chevrolet Chevy Express G3500, Van Passenger Extended
Section 537 (Engine Control System & Fuel System - 4.8L, 5.3L Or 6.0L - Introduction)
2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Section 537 (Engine Control System & Fuel System - 4.8L, 5.3L Or 6.0L - Introduction)
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2009 GMC Savana Special, 2009 GMC Savana Camper Special, 2009 GMC Savana, 2009 Chevrolet RV Cutaway, and 2009 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Schematic and Routing Diagrams
- Diagnostic Information and Procedures
- Repair Instructions
- Notes
- Engine Control Module Replacement
- Crankshaft Position System Variation Learn
- Throttle Learn
- Engine Coolant Temperature Sensor Replacement
- Mass Airflow Sensor with 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 (with 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 (Cutaway Van Rear Tank)
- Fuel Tank Replacement (Cutaway Van Side Tank)
- Fuel Tank Replacement (Passenger/Cargo)
- 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 (Cutaway Van Rear Tank Fuel Tank Pipe)
- Fuel Hose/Pipes Assembly Replacement (Cutaway Van Side Tank)
- Fuel Hose/Pipes Assembly Replacement (Passenger/Cargo Van Fuel Tank Pipes)
- 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 Flow 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
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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.