GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1392497  Size: SH

    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.)

  1. Remove the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .

  2. Object Number: 1680296  Size: SH
  3. Disconnect the vacuum supply line (3) from the evaporative emission (EVAP) canister purge valve. Refer to Plastic Collar Quick Connect Fitting Service .
  4. Disconnect the purge line (1) from the EVAP canister purge valve. Refer to Plastic Collar Quick Connect Fitting Service .

  5. Object Number: 1680299  Size: SH
  6. Disconnect the EVAP vacuum supply line from the chassis line connection (4). Refer to Plastic Collar Quick Connect Fitting Service .
  7. Remove the EVAP vacuum supply line clip (3) from the fuel line bracket.
  8. Remove the EVAP vacuum supply line from under the fuel rail.
  9. Disconnect the EVAP purge line fitting (5) and remove the line from the vehicle. Refer to Plastic Collar Quick Connect Fitting Service .

Installation Procedure


    Object Number: 1680299  Size: SH
  1. Install the purge line (5) to the fitting. Refer to Plastic Collar Quick Connect Fitting Service .
  2. Install the vacuum supply line under the fuel rail.
  3. Install the vacuum supply line clip (3) to the fuel line bracket.
  4. Connect the EVAP vacuum supply line to the chassis line connection (4). Refer to Plastic Collar Quick Connect Fitting Service .

  5. Object Number: 1680296  Size: SH
  6. Connect the EVAP purge pipe (1) to the EVAP canister valve.
  7. Connect the vacuum supply line (3) to the EVAP canister valve.

  8. Object Number: 1392497  Size: SH
  9. Install the engine sight shield. Refer to Upper Intake Manifold Sight Shield Replacement .