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HOMESERVICE MANUALSCHEVROLET2001C3500 HD 8.1 G, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1739 (ENGINE CONTROLS - 4.3L - REPAIR INSTRUCTIONS)REPAIR INSTRUCTIONSFUEL LINE REPLACEMENT - ENGINEINSTALLATION PROCEDURE
2001 Chevrolet C3500 HD 8.1 G, Automatic

Installation Procedure

2001 Chevrolet C3500 HD 8.1 G, AutomaticSECTION Installation Procedure
WARNING: This page is about a different car, the 2001 GMC Sierra and 2001 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Expanded View Of Fuel Pipe O-Ring Seals
    GM12858Courtesy of GENERAL MOTORS COMPANY
  1. Assemble the new O-rings into the inlet and the outlet of the fuel injector assembly.
    2. CAUTION:

    Always apply a few drops of clean engine oil to the male pipe ends before connecting the fuel pipe fittings in order to reduce the risk of fire and personal injury. This will ensure proper reconnection and prevent a possible fuel leak. During normal operation, the O-rings located in the female connector will swell and may prevent proper reconnection if not lubricated.

  2. Apply a few drops of clean engine oil to the male tube ends.
  3. Install the fuel feed pipes and the return pipes to the injector assembly.
    4. Fig 2: Locating Injector Fuel Inlet/Outlet Pipe Retainer Nuts
    GM12855Courtesy of GENERAL MOTORS COMPANY
  4. Install the fuel pipe retainer and the attaching nuts.
  5. Refer to FASTENER NOTICE in Cautions and Notices.

    Install the rear fuel pipe bracket retaining bolt.

    Tighten 

    1. Tighten the bolt to 6 N.m (53 lb in).
    2. Tighten the nuts to 3 N.m (27 lb in).
    6. Fig 3: View Of EVAP Pipe, Fuel Feed/Return Pipes & Engine Compartment Pipes
    GM583167Courtesy of GENERAL MOTORS COMPANY
  6. Install the new O-rings on the engine compartment fuel feed pipes and the return pipes.
  7. Install the chassis pipes (4) to the engine compartment pipes (5).

    Tighten 

    Tighten the fittings to 28 N.m (21 lb ft).

  8. Install the fuel pipes to the bellhousing stud clip (3).

    Tighten 

    Tighten the clip nut to 25 N.m (18 lb ft).

  9. Tighten the fuel filler cap.
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection (Auxiliary Battery) , Battery Negative Cable Disconnection and Connection (Single Battery) in Engine Electrical.
  11. Test for fuel leaks using the following procedure:
    1. Turn ON the ignition, with the engine OFF for 2 seconds.
    2. Turn OFF the ignition for 10 seconds.
    3. Turn ON the ignition, with the engine OFF.
    4. Inspect for fuel leaks.
  12. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Resonator 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.