2003 Chevrolet Express 2500 Service and Repair Manual

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Covers all 2003 Express 2500 trims — Base Extended Cargo Van 3-Door, Base Standard Cargo Van 3-Door, Base Extended Passenger Van 3-Door +3 more ·
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2003 Chevrolet Express 2500 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

Engines covered

  • 6.0L 5967CC 364Cu. In. V8 GAS OHV Naturally Aspirated
  • 5.3L 5328CC 325Cu. In. V8 GAS OHV Naturally Aspirated
  • 4.8L 294Cu. In. V8 GAS OHV Naturally Aspirated
  • 4.3L 262Cu. In. V6 GAS OHV Naturally Aspirated
  • 6.0L 5967CC 364Cu. In. V8 CNG 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
NHTSA #06E04300019/05/2006Component: FUEL SYSTEM, GASOLINE

CERTAIN REPLACEMENT FUEL FILTERS, FRAM BRAND NAME P/N G3727, WITH DATE CODES X52911 THROUGH X60801 SEQUENTIALLY OR X600141 AND A MEXICO COUNTRY OR ORIGIN MARKING ON THE FUEL FILTER

Consequence

THIS CONDITION MAY CAUSE AN INADEQUATE SEAL AT THE CONNECTION, POTENTIALLY LEADING TO A FU

Remedy

HONEYWELL WILL NOTIFY OWNERS AND REPLACE THE FUEL FILTERS FREE OF CHARGE. THE RECALL BEGA

TSB #11020816

This PI communicates the requirement to provide a pico file to receive diagnostic assistance from TAC.

TSB #11012907

This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.

TSB #11010544

This service bulletin explains how to measure for oil consumption and possible reasons for loss of oil.

TSB #11007208

This Preliminary Information communication provides information to the technician about changing the tire and wheel size on vehicles. General Motors will only support a tire calibration for tires that have been sized, tested and designed fo

TSB #11006621

Vehicle Wide Programming (VWP) is a new process to update software on GM Vehicles. It provides the ability via a single selection within Techline Connect to first identify which modules need updating and then proceed to updating affected mo

TSB #11006421

GM is receiving damaged (cracked or broken) transmission cores returned to the reman facilities. The damage is being caused either in the removal process by the technician, or inadequate packaging or shipping. This bulletin advises the deal

TSB #11004761

This service bulletin advises of a new fuel injection cleaner kit used for decarbonizing the intake valves to correct conditions of rough idle, Crank no start, extended crank or misfire, MIL with DTCs, and explains how Top Tier fuels should

TSB #11004557

This bulletin provides information for use on a Product Assistance Claim (PAC), which is formerly known as a Product Allegation Resolution (PAR) claim.

Showing the 8 most recent of 84 technical service bulletins on file with NHTSA.

20160922Component: ENGINE

SEVERAL OF THE EXHAUST HEADER BOLTS ARE BROKEN ON BOTH SIDES OF MY 5.3 LITTER ENGINE. I DID SOME INTERNET SEARCHING AND FOUND A LOT OF PEOPLE WITH 5.3 LITTER ENGINES HAVING THE SA

20141121Component: STEERING

I WAS TRAVELING ON THE HIGHWAY AT THE SPEED OF 50 MPH AND THE VAN SUDDENLY BEGAN TO VIOLENTLY SHAKE AND SHUDDER FROM THE FRONT WHEELS AND UP AND INCLUDING THE SHAKE OF THE STEERING

20141121Component: SERVICE BRAKES

I WAS TRAVELING ON THE HIGHWAY AT THE SPEED OF 50 MPH AND THE VAN SUDDENLY BEGAN TO VIOLENTLY SHAKE AND SHUDDER FROM THE FRONT WHEELS AND UP AND INCLUDING THE SHAKE OF THE STEERING

20141121Component: STRUCTURE:BODY

I WAS TRAVELING ON THE HIGHWAY AT THE SPEED OF 50 MPH AND THE VAN SUDDENLY BEGAN TO VIOLENTLY SHAKE AND SHUDDER FROM THE FRONT WHEELS AND UP AND INCLUDING THE SHAKE OF THE STEERING

Showing the 4 most serious of 16 complaints filed with NHTSA.

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