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HOMESERVICE MANUALSCHEVROLET2010CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 4 (ENGINE CONTROLS AND FUEL - 4.3L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSSPARK PLUG WIRE REPLACEMENTREMOVAL PROCEDURE
2010 Chevrolet Chevy Express G3500, Van Passenger Extended

Removal Procedure

2010 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Removal Procedure
WARNING: This page is about a different variant/trim than selected.
NOTE: Prior to removing the spark plug wire(s) note the correct routing of the wires as required.
    Fig 1: Locating Spark Plug Wire Boots
    GM1950006Courtesy of GENERAL MOTORS CORP.
  1. Remove the engine cover. Refer to Engine Cover Replacement .
  2. Remove the appropriate bank 1 spark plug wire boot(s) (1), or bank 2 spark plug wires boot(s) (2) from the ignition coil.
    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 ignition coil.
    3. Fig 2: Identifying Spark Plug Wire Boots & Plugs (Left Side)
    GM1950007Courtesy of GENERAL MOTORS CORP.
  3. 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.
  4. Open the spark plug wire separators (1).
  5. Remove the appropriate left side spark plug wire(s).
    6. Fig 3: Identifying Spark Plug Wire Boots & Plugs (Right Side)
    GM1950008Courtesy of GENERAL MOTORS CORP.
  6. 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.
  7. Open the spark plug wire separators (2).
  8. Remove the appropriate right side spark plug wire(s).
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.