GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2005 🢒 Terraza - 4WD 🢒 Engine 🢒 Engine Controls - 3.5L (LX9) 🢒 Evaporative Emission Hoses/Pipes Replacement - Engine/Chassis

Removal Procedure

Caution: In order to Reduce the Risk of Fire and Personal Injury:

   • If nylon fuel pipes are nicked, scratched or damaged during installation, Do Not attempt to repair the sections of the nylon fuel pipes. Replace them.
   • When installing new fuel pipes, Do Not hammer directly on the fuel harness body clips as it may damage the nylon pipes resulting in a possible fuel leak.
   • Always cover nylon vapor pipes with a wet towel before using a torch near them. Also, never expose the vehicle to temperatures higher than 115°C (239°F) for more than one hour, or more than 90°C (194°F) for any extended period.
   • Before connecting fuel pipe fittings, always apply a few drops of clean engine oil to the male pipe ends. 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.)

Notice: Do not attempt to straighten any kinked nylon fuel lines. Replace any kinked nylon fuel feed or return pipes in order to prevent damage to the vehicle.

Notice: Cap the fittings and plug the holes when servicing the fuel system in order to prevent dirt and other contaminants from entering the open pipes and passages.

  1. Relieve the fuel system pressure. Refer to Fuel Pressure Relief .
  2. Clean all engine fuel pipe connections and areas surrounding the engine fuel pipe connections before disconnecting the engine fuel pipe connections to avoid possible contamination of the fuel system.

    3. Object Number: 1544724 Size: SH
  3. Remove the fuel feed pipe retaining clip (2).
  4. Disconnect the engine fuel feed pipe (3) from the fuel rail (1). Refer to Metal Collar Quick Connect Fitting Service .
  5. Disconnect the evaporative emission (EVAP) pipe (5) from the EVAP canister purge solenoid valve (4). Refer to Plastic Collar Quick Connect Fitting Service .
  6. Cap the fuel pipes as needed to stop any fuel leakage.
  7. Remove the engine and transmission as an assembly. Refer to Engine Replacement .
  8. Perform the following procedures if equipped with auxiliary rear air and heat.
    9. 8.1. Disconnect the rear heater and A/C pipes from the rear HVAC module. Refer to Auxiliary HVAC Module Replacement .
    8.2. Move the rear heater and A/C pipes in order to remove the fuel pipes.

    Object Number: 1544726 Size: SH
  9. Disconnect the fuel feed and EVAP pipes from the fuel tank. Refer to Plastic Collar Quick Connect Fitting Service .
  10. Note the position of the fuel and EVAP pipes and the attaching hardware for installation.
  11. Remove the fuel and EVAP pipes (1).
  12. Inspect the pipes for bends, kinks, and cracks.
  13. Replace the pipe or pipes as required.

Installation Procedure

    Object Number: 1544726 Size: SH
  1. Install the fuel and EVAP pipes (1).
  2. Perform the following procedures if equipped with auxiliary rear air and heat.
    3. 2.1. Move the rear heater and A/C pipes into their original position.
    2.2. Connect the rear heater and A/C pipes to the rear HVAC module. Refer to Auxiliary HVAC Module Replacement .
  3. Connect the fuel feed and EVAP pipes to the fuel tank. Refer to Plastic Collar Quick Connect Fitting Service .
  4. Install the engine and transmission as an assembly. Refer to Engine Replacement .
  5. Remove the caps from the fuel pipes.

    6. Object Number: 1544724 Size: SH
  6. Connect the engine fuel feed pipe (3) to the fuel rail (1). Refer to Metal Collar Quick Connect Fitting Service .
  7. Connect the EVAP pipe (5) to the EVAP canister purge solenoid valve (4). Refer to Plastic Collar Quick Connect Fitting Service .
  8. Tighten the fuel filler cap.
    9. 8.1. Turn ON the ignition for 2 seconds.
    8.2. Turn OFF the ignition for 10 seconds.
    8.3. Turn ON the ignition.
    8.4. Inspect for fuel leaks.