GM Service Manual Online
For 1990-2009 cars only

Evaporative Emission Hoses/Pipes Replacement - Chassis/Canister Short Wheel Base

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.)

  1. Remove the chassis fuel bundle. Refer to Fuel Hose/Pipes Replacement - Filter to Engine .
  2. Remove the chassis purge pipe from the chassis fuel bundle.

Installation Procedure

  1. Install the chassis purge pipe in the chassis fuel bundle.
  2. Install the chassis fuel bundle. Refer to Fuel Hose/Pipes Replacement - Filter to Engine .

Evaporative Emission Hoses/Pipes Replacement - Chassis/Canister Long Wheel Base

Removal Procedure


    Object Number: 786743  Size: SH
  1. Remove the fuel tank. Refer to Fuel Tank Replacement .
  2. Disconnect the evaporative emission (EVAP) purge pipe (8) from the EVAP canister (1).
  3. Remove the EVAP purge pipe from the fuel tank retainer.

Installation Procedure


    Object Number: 786743  Size: SH
  1. Install the EVAP purge pipe (8) into the fuel tank retainer.
  2. Connect the EVAP purge pipe (8) to the EVAP canister (1).
  3. Install the fuel tank. Refer to Fuel Tank Replacement .