GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 1998 🢒 Park Avenue 🢒 Engine 🢒 Engine Controls - 3.8L 🢒 Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank

Removal Procedure

Tools Required

J 34730-1A Fuel Pressure Gauge

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 repair the EVAP pipes or the connecting hoses. Replace the damaged EVAP pipes or the connecting hoses are damaged. If the nylon EVAP pipe becomes kinked and cannot be straightened, it must be replaced.

Notice: Properly secure the EVAP pipe in order to prevent chafing of the pipe.


    Object Number: 180378 Size: SH
  1. Relieve the fuel system pressure. Refer to the Fuel Pressure Relief .

    2. Object Number: 211302 Size: SH
  2. Drain the fuel tank (1). Refer to Fuel Tank Draining .

    3. Object Number: 155114 Size: SH
  3. Remove the fuel tank. Refer to Fuel Tank Replacement .
  4. Remove the hardware retaining the EVAP pipes. Note the location of the retaining hardware for installation.

    5. Object Number: 104621 Size: SH
  5. Remove the EVAP pipes (1,2,3) at the EVAP canister.
  6. Remove the EVAP pipes at the fuel tank.
  7. Remove the EVAP pipes.

Installation Procedure

Notice: Always re-attach the fuel lines and fuel filter with all original type fasteners and hardware.

Do not repair sections of fuel pipes.

Important: Route the replacement EVAP pipe in the same manner as the original pipe was routed.


    Object Number: 65746 Size: SH
  1. Install the fuel tank (4). Refer to Fuel Tank Replacement .

    2. Object Number: 104621 Size: SH

    Notice: Properly secure the EVAP pipe in order to prevent chafing of the pipe.

  2. Install the EVAP pipes to the chassis.
  3. Install the EVAP pipes (1,2,3) to the EVAP canister.
  4. Add fuel and install the fuel tank filler pipe cap.
  5. Connect the negative battery cable. Refer to Battery Cable Replacement in Engine Electrical.
  6. Inspect for leaks.
    7. 6.1. Turn the ignition switch to the On position for 2 seconds.
    6.2. Turn the ignition switch to the Off for 10 seconds.
    6.3. Turn the ignition switch to the On position.
    6.4. Check for fuel leaks.
  7. Install the fuel injector sight shield. Refer to Fuel Injector Sight Shield Replacement in Engine Mechanical.