GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2008 🢒 XLR 🢒 Engine 🢒 Engine Controls and Fuel - 4.6L (LH2) 🢒 Fuel Hose/Pipes Replacement - Chassis

Special Tools

    • J 34730-1A Fuel Pressure Gage
    • J 37088-A Fuel Line Disconnect Tool Set

Removal Procedure

    Caution: Refer to Battery Disconnect Caution in the Preface section.


    Object Number: 1272602 Size: SH
  1. Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  2. Remove the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  3. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .

    4. Object Number: 931736 Size: SH

    Notice: 

       • Do not repair the fuel feed or return pipes.
       • Replace the fuel feed and return pipes with original equipment or with parts that meet the GM specifications for those parts. The replacement pipe must have the same type of fittings as the original pipe in order to ensure the integrity of the connection.

  4. Disconnect the fuel feed hose (2) from the chassis fuel feed pipe (3). Refer to Metal Collar Quick Connect Fitting Service .
  5. Cap the engine compartment fuel feed pipe.

    6. Object Number: 931859 Size: SH
  6. Disconnect the chassis fuel and EVAP pipe retainer (1) from the upper front of dash mounting stud (3).

    7. Caution: To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

  7. Raise the vehicle. Refer to Lifting and Jacking the Vehicle .
  8. Remove the exhaust intermediate pipe. Refer to Intermediate Pipe Replacement .

    9. Object Number: 67894 Size: SH
  9. Remove the floor panel tunnel panel reinforcement. Refer to Floor Panel Tunnel Panel Reinforcement Replacement .

    10. Object Number: 329574 Size: SH
  10. Disconnect the chassis fuel pipe (5) from the underbody retainers (6).
  11. Remove the chassis fuel pipe.

Installation Procedure

Important: 

   • Follow the same routing as the original pipe.
   • Secure the pipe in order to prevent chafing.
   • Do not kink or bend the pipe.


    Object Number: 329574 Size: SH
  1. Install the chassis fuel pipe (5) into the underbody retainers (6).
  2. Connect the chassis fuel feed pipe.

    3. Object Number: 67894 Size: SH
  3. Install the floor panel tunnel panel reinforcement. Refer to Floor Panel Tunnel Panel Reinforcement Replacement .
  4. Install the exhaust intermediate pipe. Refer to Intermediate Pipe Replacement .
  5. Lower the vehicle.
  6. Remove the cap from the engine compartment fuel feed pipe.

    7. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 931859 Size: SH
  7. Connect the chassis fuel and EVAP pipe retainer (1) at the upper front of dash mounting stud (3).

    8. Tighten
    Tighten the fuel and EVAP pipe retainer nut to 6 N·m (53 lb in).


    Object Number: 931736 Size: SH
  8. Connect the fuel feed hose (2) to the chassis fuel feed pipe (3). Refer to Metal Collar Quick Connect Fitting Service .
  9. Tighten the fuel filler cap.
  10. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  11. Perform the following procedure in order to inspect for leaks:
    12. 11.1. Turn the ignition switch ON for 2 seconds.
    11.2. Turn the ignition switch OFF for 10 seconds.
    11.3. Turn the ignition switch ON.
    11.4. Inspect for fuel leaks.

    Object Number: 1272602 Size: SH
  12. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement .
  13. Program the transmitters. Refer to Transmitter Programming .