GM Service Manual Online
For 1990-2009 cars only

Evaporative Emission Hoses/Pipes Replacement - Engine Purge Pipe

Removal Procedure

  1. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

  2. Object Number: 783172  Size: SH
  3. Disconnect the engine purge pipe from the evaporative emission (EVAP) canister purge valve.
  4. Disconnect the engine purge pipe from the chassis purge pipe.
  5. Remove the engine purge pipe.

Installation Procedure

  1. Position the engine purge pipe to the EVAP canister purge valve and the chassis purge pipe.

  2. Object Number: 783172  Size: SH
  3. Connect the engine purge pipe to the chassis purge pipe.
  4. Connect the engine purge pipe to the EVAP chassis purge valve.
  5. Install the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .

Evaporative Emission Hoses/Pipes Replacement - Engine Vacuum Pipe

Removal Procedure

  1. Remove the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .

  2. Object Number: 783172  Size: SH
  3. Disconnect the engine purge vacuum pipe from the intake manifold.
  4. Disconnect the engine purge vacuum pipe from the EVAP canister purge valve.
  5. Remove the engine purge vacuum pipe.

Installation Procedure


    Object Number: 783172  Size: SH
  1. Place the engine purge vacuum pipe to the EVAP canister purge valve and intake manifold.
  2. Connect the engine purge vacuum pipe to the EVAP canister purge valve.
  3. Connect the engine purge vacuum pipe to the intake manifold.
  4. Install the air cleaner outlet resonator. Refer to Air Cleaner Outlet Resonator Replacement .