GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 1238964  Size: SH
  1. Disconnect the evaporative emission (EVAP) canister purge valve harness connector.
  2. Disconnect the vacuum pipe from the EVAP canister purge valve.
  3. Disconnect the purge pipe from the EVAP canister purge valve.

  4. Object Number: 857194  Size: SH
  5. Remove the EVAP canister purge valve and bracket.
  6. Remove the EVAP canister purge valve from the purge bracket.
  7. Inspect for carbon release in the EVAP canister purge valve ports. If there is any loose carbon, replace the EVAP canister and any components necessary to remove the carbon particles.

Installation Procedure

  1. Install the EVAP canister purge valve on to the purge bracket.

  2. Object Number: 857194  Size: SH

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Install the EVAP canister purge valve and bracket.
  4. Tighten
    Tighten the purge bracket nut to 8 N·m (71 lb in).


    Object Number: 1238964  Size: SH
  5. Connect the purge pipe to the EVAP canister purge valve.
  6. Connect the vacuum pipe to the EVAP canister purge valve.
  7. Connect the EVAP canister purge valve harness connector.