GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 21394  Size: SH
  1. Disconnect the Negative battery cable.
  2. Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  3. Loosen the fuel filler cap in order to relieve the system pressure.
  4. Remove the intake plenum. Refer to Intake Plenum Removal and Installation.
  5. Remove the valve bracket mounting bolt.
  6. Disconnect the harness connector from the valve.
  7. Disconnect the purge line and the vacuum source line from the valve.
  8. Remove the purge valve.

Installation Procedure


    Object Number: 21394  Size: SH
  1. Connect the purge line and the vacuum source line to the valve.
  2. Connect the harness connector.
  3. Install/tighten the valve bracket mounting bolt.
  4. Install the intake plenum. Refer to Intake Plenum Removal and Installation.
  5. Tighten the fuel filler cap.
  6. Connect the Negative battery cable.