GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2000 🢒 Yukon - 4WD 🢒 Engine 🢒 Engine Controls - 4.8L, 5.3L, and 6.0L 🢒 Fuel Hose/Pipes Replacement - Chassis

Removal Procedure

    Object Number: 300360 Size: SH

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cable.
  2. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .
  3. Clean all the fuel pipe connections and the surrounding areas before disconnecting the pipes in order to avoid possible contamination of the fuel system.
  4. Disconnect the fuel feed and return pipes (1), (2) from the fuel rail. Refer to Metal Collar Quick Connect Fitting Service .
  5. Cap the fuel rail pipes.
  6. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.
  7. Remove the fuel pipes from the bellhousing stud clip (4).
  8. Remove the fuel pipes from the transmission bracket clip.

    9. Object Number: 300385 Size: SH
  9. Remove the fuel pipes from the transfer case bracket clip 4, wheel drive only.

    10. Object Number: 303981 Size: SH
  10. Remove the evaporative emission (EVAP) canister from the vehicle. Refer to Evaporative Emission Canister Replacement .

    11. Object Number: 303903 Size: SH
  11. Disconnect the chassis fuel feed and return pipes at the rear fuel feed and return pipes.
  12. Cap the rear fuel pipes.

    13. Object Number: 304560 Size: SH
  13. Note the position of the fuel pipes for aid in installation.
  14. Remove the fuel pipes from the retaining clips (1).
  15. Remove the fuel pipes.

Installation Procedure

    Object Number: 304560 Size: SH

    Important: 

       • When replacing the fuel pipes, always replace them with original equipment or parts that meet the GM specifications for those parts. The replacement pipes must have the same type of fittings as the original pipes in order to ensure the integrity of the connection.
       • DO NOT use copper or aluminum tubing to replace steel tubing. Only tubing meeting the 124-M specification or its equivalent is capable of meeting all pressure, corrosion and vibration characteristics necessary to ensure the durability standard required.

  1. Install the fuel pipes into the retaining clips (1).

    2. Object Number: 303903 Size: SH
  2. Remove the caps from the rear fuel pipes.
  3. Connect the chassis fuel feed and return pipes at the rear fuel feed and return pipes.

    4. Object Number: 303981 Size: SH
  4. Install the EVAP canister. Refer to Evaporative Emission Canister Replacement .

    5. Object Number: 300385 Size: SH
  5. Install the fuel pipes into the transfer case bracket clip, 4 wheel drive only.

    6. Object Number: 300360 Size: SH
  6. Install the fuel pipes into the transmission bracket clip.
  7. Install the fuel pipes into the bellhousing stud clip (4).
  8. Lower the vehicle.
  9. Remove the caps from the fuel rail pipes.
  10. Connect the fuel feed and return pipes (1), (2) to the fuel rail.
  11. Tighten the fuel filler cap.
  12. Connect the negative battery cable.
  13. Inspect for leaks.
    14. 13.1. Turn the ignition ON for 2 seconds.
    13.2. Turn the ignition OFF for 10 seconds.
    13.3. Turn the ignition ON.
    13.4. Inspect for fuel leaks.