GM Service Manual Online
For 1990-2009 cars only

Upper Intake Manifold Sight Shield Replacement 4.8L, 5.3L, and 6.0L Engines

Removal Procedure


    Object Number: 665886  Size: SH
  1. Loosen the engine sight shield bolt.
  2. Remove the engine sight shield from the sight shield retainer.

  3. Object Number: 684149  Size: SH
  4. If removal of the engine sight shield retainer is required, disconnect the accelerator control cable clip from the retainer.

  5. Object Number: 684150  Size: SH
  6. Disconnect the cruise control cable clip from the retainer.
  7. Remove the engine sight shield retainer bolts and the retainer, if required.

Installation Procedure


    Object Number: 684150  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.

  1. Install the engine sight shield retainer and the bolts, if required.
  2. Tighten
    Tighten the engine sight shield retainer bolts to 5 N·m (44 lb in).

  3. Install the cruise control cable clip to the retainer.

  4. Object Number: 684149  Size: SH
  5. Install the accelerator control cable clip to the retainer.

  6. Object Number: 665886  Size: SH

    Notice: Use care when installing the engine sight shield to avoid contacting the manifold absolute pressure (MAP) sensor wire harness connector. Loss of engine performance or engine damage may result.

  7. Install the engine sight shield to the retainer.
  8. Tighten the engine sight shield bolt.
  9. Tighten
    Tighten the engine sight shield bolt to 10 N·m (89 lb in).

Upper Intake Manifold Sight Shield Replacement 6.0L Engine w/ RPOs Y91 and Z88

Removal Procedure


    Object Number: 665888  Size: SH
  1. Loosen the intake manifold sight shield bolt.
  2. Remove the sight shield from the sight shield retainer.
  3. If required, remove the sight shield retainer bolts and the retainer.

  4. Object Number: 665895  Size: SH
  5. Loosen the left fuel rail cover bolts.
  6. Remove the left fuel rail cover.

  7. Object Number: 665889  Size: SH
  8. Remove the surge tank/heater hoses from the clip on the right fuel rail cover.
  9. Loosen the right fuel rail cover bolts.
  10. Remove the right fuel rail cover.

Installation Procedure


    Object Number: 665889  Size: SH
  1. Install the right fuel rail cover.
  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.

  3. Tighten the right fuel rail cover bolts.
  4. Tighten
    Tighten the fuel rail cover bolts to 9 N·m (80 lb in)

  5. Install the surge tank/heater hoses to the clip on the right fuel rail cover.

  6. Object Number: 665895  Size: SH
  7. Install the left fuel rail cover.
  8. Tighten the left fuel rail cover bolts.
  9. Tighten
    Tighten the fuel rail cover bolts to 9 N·m (80 lb in)


    Object Number: 665888  Size: SH
  10. Install the sight shield retainer and the bolts, if required.
  11. Tighten
    Tighten the intake manifold sight shield retainer bolts to 5 N·m (44 lb in).

    Notice: Use care when installing the engine sight shield to avoid contacting the manifold absolute pressure (MAP) sensor wire harness connector. Loss of engine performance or engine damage may result.

  12. Install the intake manifold sight shield to the retainer.
  13. Tighten the intake manifold sight shield bolt.
  14. Tighten
    Tighten the intake manifold sight shield bolt to 9 N·m (80 lb in)