GM Service Manual Online
For 1990-2009 cars only

Removal Procedure

Important: This engine uses a sequential multiport fuel injection system. Connect the injector connectors to their appropriate fuel injector or exhaust emissions and engine performance may be seriously affected. For the correct connector to injector connection procedure, refer to Engine Electrical.

  1. Disconnect the negative battery cable. Refer to

    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.

    in General Information.
  2. Remove the air cleaner duct. Refer to Engine Controls.
  3. Remove the accelerator control and cruise control cable from the throttle body. Refer to Engine Controls.
  4. Remove the accelerator control cable bracket. Move the cable aside.

  5. Object Number: 54419  Size: SH
  6. Remove the thermostat bypass pipe clip nut from the upper intake manifold.
  7. Remove the automatic transaxle vacuum modulator pipe. Refer to Automatic Transmission.
  8. Remove the power brake booster vacuum hose from the manifold. Refer to Vacuum Booster System.
  9. Remove the engine mount strut at the engine. Refer to Engine Mount Strut Replacement .
  10. Rotate the engine. Refer to Rotating the Engine for Service Access .
  11. Remove the electrical connectors from the ignition coil. Refer to Engine Electrical.
  12. Remove the ignition coil. Refer to Engine Electrical.
  13. Remove the generator front and rear braces. Refer to Engine Electrical.
  14. Remove the electrical connectors from the manifold. Refer to Engine Electrical.
  15. Remove all of the necessary vacuum hoses.
  16. Remove the MAP sensor. Refer to Engine Controls.
  17. Remove the exhaust gas recirculation (EGR) valve. Refer to Engine Controls.

  18. Object Number: 54358  Size: SH
  19. Remove the upper intake manifold studs.
  20. Remove the upper intake manifold bolts.
  21. Remove the upper intake manifold.
  22. Remove the upper intake manifold gasket.
  23. Clean the gasket with degreaser.
  24. Clean the seal surfaces on the manifold with degreaser.

Installation Procedure


    Object Number: 54358  Size: SH
  1. Install the upper intake manifold gasket.
  2. Install the upper intake manifold.
  3. Install the upper intake manifold studs
  4. Install the upper intake manifold bolts.
  5. Tighten
    Tighten the studs and bolts to 25 N·m (18 lb ft).

    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.

  6. Install the exhaust gas recirculation (EGR) valve. Refer to Engine Controls.
  7. Install the MAP sensor. Refer to Engine Controls.
  8. Install all of the necessary vacuum hoses.
  9. Install the electrical connectors to the manifold. Refer to Engine Electrical.
  10. Install the generator front and rear braces. Refer to Engine Electrical.
  11. Install the ignition coil. Refer to Engine Electrical.
  12. Install the electrical connectors to the ignition coil. Refer to Engine Electrical.
  13. Rotate the engine. Refer to Rotating the Engine for Service Access .
  14. Install the engine mount struts at the engine. Refer to Engine Mount Strut Replacement .
  15. Install the power brake booster vacuum hose to the manifold. Refer to Vacuum Booster System.
  16. Install the automatic transaxle vacuum modulator pipe. Refer to Automatic Transaxle.

  17. Object Number: 54419  Size: SH
  18. Install the thermostat bypass clip nut to the upper intake manifold.
  19. Install the accelerator control cable bracket. Refer to Engine Controls.
  20. Install the accelerator control and cruise control cable to the throttle body. Refer to Engine Controls.
  21. Install the air cleaner duct. Refer to Engine Controls.
  22. Connect the negative battery cable. Refer to Engine Electrical.