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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.3L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSSPARK PLUG REPLACEMENTREMOVAL PROCEDURE
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Removal Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Removal Procedure
WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Spark Plug Wire Boots & Plugs (Left Side)
    GM1950007Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine cover, if required. Refer to Engine Cover Replacement .
  2. If required, remove the appropriate left side spark plug wire boot(s) (2) from the spark plug(s).
    1. Twist the spark plug boot 1/2 turn.
    2. Pull ONLY on the spark plug boot or use a tool designed for this purpose in order to remove the spark plug wire boot from the spark plug.
    3. Fig 2: Identifying Spark Plug Wire Boots & Plugs (Right Side)
    GM1950008Courtesy of GENERAL MOTORS CORP.
  3. If required, remove the appropriate right side spark plug wire boot(s) (1) from the spark plug(s).
    1. Twist the spark plug boot 1/2 turn.
    2. Pull ONLY on the spark plug boot or use a tool designed for this purpose in order to remove the spark plug wire boot from the spark plug.
    4. Fig 3: Identifying Left Side Spark Plugs
    GM1950043Courtesy of GENERAL MOTORS CORP.
  4. If required, loosen the appropriate left side spark plug 1 or 2 turns.
  5. Brush or air blast away any dirt from around the spark plug.
  6. Remove the appropriate left side spark plug (1). If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
    7. Fig 4: Identifying Right Side Spark Plugs
    GM1950044Courtesy of GENERAL MOTORS CORP.
  7. If required, loosen the appropriate right side spark plug 1 or 2 turns.
  8. Brush or air blast away any dirt from around the spark plug.
  9. Remove the appropriate right side spark plug (1). If removing more than 1 plug, place each plug in a tray marked with the corresponding cylinder number.
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.