2003 Chevrolet Express 3500 Service and Repair Manual

2003 Chevrolet Express 3500 service and repair manual — a detailed, factory-style reference for maintenance, diagnostics, and repair. Use it to confirm correct procedures, specifications, and system coverage before you start work.

Designed for technicians and DIY owners, this manual helps you troubleshoot accurately, follow step-by-step repair procedures, and reference wiring diagrams and system sections quickly while you work.

What’s included

• Step-by-step repair procedures and service information
• Specifications and reference data (where provided)
• Wiring diagrams and electrical sections
• Powertrain, brakes, steering, suspension, HVAC and more

Trims covered

• Base Extended Cargo Van 3-Door
• Base Standard Cargo Van 3-Door
• Base Extended Passenger Van 3-Door
• LS Extended Passenger Van 3-Door
• LS Standard Passenger Van 3-Door
• Base Standard Passenger Van 3-Door
• Base Cutaway Van 2-Door

Engines covered

• 6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated
• 4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated
• 6.0L 5967CC 364Cu. In. V8 CNG OHV Naturally Aspirated
• 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated

Index / Table of contents

• Body
• Brakes
• Chassis Electrical
• Driveline
• Engine Cooling
• Engine Electrical
• Engine Mechanical
• Engine Performance & Emission Controls
• Fuel System
• General Information & Identification
• Heating, Ventilation, & Air Conditioning
• Hybrid & Electric Vehicle Systems
• Steering
• Suspension
• Transmission, Clutch, & Transfer Case
• Wiring Diagrams