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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G3500, VAN PASSENGER EXTENDEDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 143 (ENGINE CONTROLS AND FUEL - 3.5L - INTRODUCTION (2 OF 2))REPAIR INSTRUCTIONSSPARK PLUG WIRE REPLACEMENTINSTALLATION PROCEDURE
2008 Chevrolet Chevy Express G3500, Van Passenger Extended

Installation Procedure

2008 Chevrolet Chevy Express G3500, Van Passenger ExtendedSECTION Installation Procedure
WARNING: This page is about a different car, the 2008 Chevrolet Malibu Classic. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Spark Plug Wire Assembly
    GM1798989Courtesy of GENERAL MOTORS CORP.
  1. Install the spark plug wire assembly.
  2. Connect the right side spark plugs to the ignition coils.
  3. Connect the right side spark plug wires to the spark plugs.
  4. If replacing only one plug wire, open the retaining clip and install the appropriate spark plug wire.
    5. Fig 2: View Of Left Side Spark Plug Wires
    GM1774994Courtesy of GENERAL MOTORS CORP.
  5. Install the spark plug wire assembly.
  6. Connect the left side spark plug wires to the spark plugs.
  7. Connect the left side spark plug wires to the ignition coil.
  8. Install the spark plug wire clips to the MAP sensor bracket and the heater inlet and outlet pipe tab.
  9. If replacing only one plug wire, open the retaining clips and install the appropriate spark plug wire.
  10. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
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.