GM Service Manual Online
For 1990-2009 cars only

Lower Intake Manifold Assemble Procedure


    Object Number: 1864264  Size: SH
  1. Install the upper-to-lower intake manifold alignment pins.

  2. Object Number: 1864263  Size: SH
  3. Install the fuel injector rail.
  4. Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1864262  Size: SH
  5. Install the fuel injector rail bolts.
  6. Tighten
    Tighten the fuel injector rail bolts to 10 N·m (89 lb in).


    Object Number: 1864261  Size: SH
  7. Install the fuel injector wiring harness connector.

Upper Intake Manifold Assemble Procedure


    Object Number: 1864260  Size: SH
  1. Install the fuel injector sight shield ballstud.
  2. Tighten
    Tighten the fuel injector sight shield ballstud to 10 N·m (89 lb in).


    Object Number: 1864259  Size: SH
  3. Install a NEW intake manifold tuning valve O-ring.

  4. Object Number: 1864258  Size: SH
  5. Install the intake manifold tuning valve.

  6. Object Number: 1864257  Size: SH
  7. Install the intake manifold tuning valve bolts.
  8. Tighten
    Tighten the intake manifold tuning valve bolts to 10 N·m (89 lb in).


    Object Number: 1864256  Size: SH
  9. Install the NEW throttle body gasket.

  10. Object Number: 1864255  Size: SH
  11. Install the throttle body.

  12. Object Number: 1864254  Size: SH
  13. Install the throttle body bolts.
  14. Tighten
    Tighten the throttle body bolts to 10 N·m (89 lb in).


    Object Number: 1864252  Size: SH
  15. Install the manifold absolute pressure (MAP) sensor.

  16. Object Number: 1864251  Size: SH
  17. Install the MAP sensor bolt.
  18. Tighten
    Tighten the MAP sensor bolt to 10 N·m (89 lb in).

Upper to Lower Intake Manifold Assemble Procedure


    Object Number: 1864250  Size: SH

    Important: Do not reuse the upper-to-lower intake manifold gasket and the intake manifold-to-cylinder head sealing gaskets.

  1. Install the NEW upper-to-lower intake manifold gaskets.

  2. Object Number: 1864249  Size: SH
  3. Install the upper intake manifold to the lower intake manifold.

  4. Object Number: 1864248  Size: SH
  5. Install the fuel injector wiring harness bracket bolt to the upper intake manifold.
  6. Tighten
    Tighten the fuel injector wiring harness bracket bolt to 10 N·m (89 lb in).


    Object Number: 1864247  Size: SH
  7. Install the upper-to-lower intake manifold bolts.
  8. Tighten
    Tighten the upper-to-lower intake manifold bolts to 23 N·m (17 lb ft).