GM Service Manual Online
For 1990-2009 cars only

Center Intake Manifold Replacement LMM

Removal Procedure


    Object Number: 1868106  Size: SH
  1. Remove the turbocharger. Refer to Turbocharger Replacement .
  2. Disconnect the engine wiring harness electrical connector from the intake air temperature (IAT) sensor No. 2.

  3. Object Number: 1868096  Size: SH
  4. Remove 6 center intake manifold bolts (1).
  5. Remove 2 center intake manifold nuts (2).
  6. Remove the center intake manifold.
  7. Remove and discard the center intake manifold gaskets.
  8. If replacing the center intake manifold, remove the IAT sensor. Refer to Intake Air Temperature (IAT) Sensor 2 Replacement .

Installation Procedure


    Object Number: 1868096  Size: SH
  1. If the center intake manifold was replaced, install the IAT sensor No. 2. Refer to Intake Air Temperature (IAT) Sensor 2 Replacement .
  2. Install NEW center intake manifold gaskets to the intake.
  3. Install the center intake manifold.
  4. Notice: Refer to Fastener Notice in the Preface section.

    Important: The center intake manifold lower nuts MUST be installed and tightened first.

  5. Install the center intake manifold lower 2 nuts (2).
  6. Tighten
    Tighten the nuts to 10 N·m (89 lb in).

  7. Install the center intake manifold upper 6 bolts (1).
  8. Tighten
    Tighten the bolts to 10 N·m (89 lb in).


    Object Number: 1868106  Size: SH
  9. Connect the engine wiring harness electrical connector to the IAT sensor No. 2.
  10. Install the turbocharger. Refer to Turbocharger Replacement .