GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2003 🢒 Astro - 4WD 🢒 Engine 🢒 Engine Electrical 🢒 Fuel Hose/Pipes Replacement - Engine Compartment

Removal Procedure
  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .

    2. Object Number: 12854 Size: SH
  2. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
  3. Disconnect the left bank spark plug wires from the distributor. Refer to Spark Plug Wire Replacement .
  4. Disconnect the fuel pipes at the rear of the intake manifold.

    5. Object Number: 12855 Size: SH
  5. Remove the injector fuel inlet and outlet pipe retainer nuts.
  6. Remove the injector fuel inlet and the outlet pipe retainer.

    7. Object Number: 12856 Size: SH
  7. Remove the rear fuel pipe bracket retaining bolt.

    8. Object Number: 12858 Size: SH
  8. Pull straight up on the fuel pipes in order to remove the fuel pipes from the fuel meter body.
  9. Remove the O-ring seals from both ends of the fuel feed and return pipes.
  10. Discard the O-ring seals.

Installation Procedure

    Object Number: 12858 Size: SH
  1. Assemble the new O-rings into the inlet and outlet of the fuel meter body.

    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 and return pipes to the fuel meter body.

    4. Object Number: 12855 Size: SH
  4. Install the fuel pipe retainer and the attaching nuts.

    5. Once installed, pull on both ends of each connection in order to make sure they are secure.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the rear fuel pipe bracket retaining bolt.

    6. Tighten

    1. Tighten the rear fuel pipe bracket bolt to 6 N·m (53 lb in).
    2. Tighten the fuel pipe retainer nuts to 3 N·m (27 lb in).

    Object Number: 12854 Size: SH
  6. Install the new O-ring seals on the engine fuel feed and the return pipes.
  7. Connect the fuel feed and return pipes to the engine fuel pipes.

    8. Tighten
    Tighten the fuel pipe fittings to 30 N·m (22 lb ft).

  8. Connect the negative battery cable.
  9. Inspect for fuel leaks.
    10. 9.1. Turn ON the ignition, with the engine OFF, for 2 seconds.
    9.2. Turn OFF the ignition for 10 seconds.
    9.3. Turn ON the ignition, with the engine OFF.
    9.4. Inspect for fuel leaks.
  10. Connect the left bank spark plug wires to the distributor. Refer to Spark Plug Wire Replacement .
  11. Install the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .
  12. Install the engine cover. Refer to Engine Cover Replacement in Interior Trim.