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HOMESERVICE MANUALSCHEVROLET2008CHEVY EXPRESS G2500, VAN CARGO, 6.6 6REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 2075 (ENGINE CONTROL SYSTEM & FUEL SYSTEM - 4.3L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSFUEL INJECTOR CLEANING
2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6

Fuel Injector Cleaning

2008 Chevrolet Chevy Express G2500, Van Cargo, 6.6 6SECTION Fuel Injector Cleaning
WARNING: This page is about a different car, the 2010 GMC Sierra and 2010 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

Special Tools

  • J 38500-A  Fuel Injector Cleaner
  • J 39021  Fuel Injector Coil and Balance Tester
  • J 39021-210  Injector Tester Adapter Box. See Special Tools .
  • J 39021-301  V6 Fuel Injector Test Adapter
  • J 41413  EVAP Pressure and Purge Station
  • J 44466-10  Regulator and Hose Assembly
  • J 44466-11  IAFM Fuel Transfer Tube Recycling Block
  • J 44466-12  CSFI Fuel Metering Body Jumper Block
  • J 44466-13  Screws
    Fig 1: Removing Fuel Feed Pipe
    GM1655473Courtesy of GENERAL MOTORS CORP.
  1. Loosen the fuel fill cap to relieve vapor pressure in the fuel tank.
  2. Relieve the fuel system pressure.
  3. Remove the positive crankcase ventilation (PCV) clean air tube from air inlet duct and set aside.
  4. Remove the resonator and air inlet duct from throttle body.
  5. Remove the brake booster vacuum hose and connector from intake manifold.
  6. Remove the electrical connector from the central sequential fuel injection (CSFI) fuel metering body.
  7. Remove the spark plug wires from 1, 3 and 5 from the distributor cap.
  8. Remove the fuel feed pipe bracket stud (3).
  9. Remove the fuel pipe retainer nuts (2) and retainer (1).
  10. Remove fuel feed pipe (4).
    11. NOTE: Make sure that the fuel pipe O-rings, washers, and spacers are present and in their proper position.
RENDER: 1.0x

NO RELATED

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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.