GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Engine 🢒 Engine Cooling 🢒 Center Intake Manifold Replacement

Removal Procedure

    Object Number: 1873384 Size: SH
  1. Remove the exhaust gas recirculation (EGR) valve cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement.
  2. Remove the water outlet tube. Refer to Water Outlet Tube Replacement.
  3. Remove the intake manifold tube.
  4. Remove and discard the 2 intake manifold tube gaskets.
  5. Remove the turbocharger. Refer to Turbocharger Replacement.

    6. Object Number: 1602068 Size: SH
  6. Disconnect the intake air temperature (IAT) sensor electrical connector (1).
  7. Remove the IAT sensor (2).

    8. Object Number: 1335931 Size: SH
  8. Remove the center intake manifold bolts/nuts.
  9. Pull-up the center intake manifold in order to remove.
  10. Remove and discard the gaskets.
  11. Clean the center intake manifold in cleaning solvent and air dry.

Installation Procedure

    Object Number: 1335931 Size: SH
  1. Install NEW center intake manifold gaskets.

    2. Notice: Refer to Fastener Notice in the Preface section.

  2. Install the center intake manifold.
  3. Install the center intake manifold bolts/nuts.

    4. Tighten
    Tighten the bolts/nuts to 10 N·m (89 lb in).


    Object Number: 1602068 Size: SH
  4. Install the IAT sensor (2).

    5. Tighten
    Tighten the sensor to 10 N·m (89 lb in).

  5. Connect the IAT sensor electrical connector (1).
  6. Install the turbocharger. Refer to Turbocharger Replacement.

    7. Object Number: 1873384 Size: SH
  7. Install 2 NEW O-rings onto the intake manifold tube.
  8. Lubricate the O-rings with clean engine oil to aid in the installation.
  9. Install the intake manifold tube.
  10. Install the water outlet tube. Refer to Water Outlet Tube Replacement.
  11. Install the EGR valve cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement.