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Home >> GMC >> 2001 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Engine Controls - 4.3L - Repair Instructions) >> Repair Instructions >> Fuel Line Replacement - Engine >> Installation Procedure

Installation Procedure

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    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 .
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