GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2003 🢒 Seville 🢒 Engine 🢒 Engine Controls - 4.6L 🢒 Secondary Air Injection Shutoff Valve Replacement - Bank 1

Removal Procedure
  1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 784719 Size: SH
  2. Remove the two nuts securing the outlet pipe to the exhaust manifold.
  3. Lower the vehicle.

    4. Object Number: 784720 Size: SH
  4. Disconnect the bank 1 intermediate pipe/hose from the bank 1 AIR shut-off valve.

    5. Object Number: 784725 Size: SH
  5. Remove the vacuum lines connected to the bank 1 AIR shut-off valve.

    6. Object Number: 784719 Size: SH
  6. Remove the three bolts securing the AIR shut-off valve to the engine.
  7. Remove the AIR shut-off valve from the bank 1 AIR outlet pipe.

Installation Procedure

    Object Number: 784719 Size: SH
  1. Connect the bank 1 AIR shut-off valve with a new gasket to the bank 1 AIR outlet pipe.

    2. 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.

  2. Install the three bolts securing the bank 1 AIR shut-off valve to the engine.

    3. Tighten
    Tighten the three bolts to 9 N·m (80 lb in).


    Object Number: 784725 Size: SH
  3. Install the vacuum lines.

    4. Object Number: 784720 Size: SH
  4. Reconnect the bank 1 AIR intermediate pipe/hose and clamp to the bank 1 AIR shut-off valve.
  5. Raise the vehicle. Refer to Lifting and Jacking the Vehicle in General Information.

    6. Object Number: 784719 Size: SH
  6. Install the two nuts securing the bank 1 AIR outlet pipe to the exhaust manifold.

    7. Tighten
    Tighten the two nuts to 9 N·m (80 lb in).

  7. Lower the vehicle.