GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Envoy - 2WD 🢒 Engine 🢒 Engine Controls and Fuel - 4.8L, 5.3L, 6.0L, 6.2L, or 7.0L 🢒 Evaporative Emission Hoses/Pipes Replacement - Canister/Fuel Tank

Removal Procedure

Caution: In order to reduce the risk of fire and personal injury observe the following items:

   • Replace all nylon fuel pipes that are nicked, scratched or damaged during installation, do not attempt to repair the sections of the nylon fuel pipes
   • Do not hammer directly on the fuel harness body clips when installing new fuel pipes. Damage to the nylon pipes may result in a 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.
   • Apply a few drops of clean engine oil to the male pipe ends before connecting fuel pipe fittings. 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: Clean all of the following areas before performing any disconnections in order to avoid possible contamination in the system:

   • The fuel pipe connections
   • The hose connections
   • The areas surrounding the connections

  1. Remove the fuel tank. Refer to Fuel Tank Replacement .

    2. Object Number: 1480092 Size: SH
  2. Release the evaporative emission (EVAP) hose assembly retainers (1) from the fuel tank heat shield.

    3. Important: Before disconnecting or reconnecting EVAP pipes. Refer to Plastic Collar Quick Connect Fitting Service .


    Object Number: 1480093 Size: SH
  3. Cut and remove the ties (1) securing the EVAP hoses.
  4. Disconnect the EVAP hose assembly (3) from the fuel tank vent valves and fuel module.
  5. Remove the EVAP hose assembly from the fuel tank.
  6. Remove the EVAP canister purge pipe (2) from the fuel tank.

Installation Procedure

    Object Number: 1480093 Size: SH
  1. Install the EVAP canister purge pipe (2) to the fuel tank.
  2. Install the EVAP hose assembly to the fuel tank.
  3. Connect the EVAP hose assembly (3) to the fuel tank vent valves and fuel module.
  4. Install new ties (1) securing the EVAP hoses.

    5. Object Number: 1480092 Size: SH
  5. Attach the EVAP hose assembly retainers (1) to the fuel tank heat shield.
  6. Install the fuel tank. Refer to Fuel Tank Replacement .