GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2004 🢒 TopKick C-Series (Conventional) C4/C5 🢒 Engine 🢒 Engine Mechanical - 6.6L (LLY) 🢒 Center Intake Manifold Replacement

Removal Procedure
  1. Remove the air cleaner layer. Refer to Air Cleaner Replacement in Engine Controls.

    2. Object Number: 1335575 Size: SH
  2. Remove the exhaust gas recirculation (EGR) valve cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement in Engine Controls.
  3. Remove the intake manifold tube by prying the tube out of the center intake manifold dowel pin.
  4. Remove the turbocharger. Refer to Turbocharger Replacement .

    5. Object Number: 1335931 Size: SH
  5. Remove the center intake manifold bolts/nuts.
  6. Pull-up the center intake manifold in order to remove.
  7. Remove and discard the gaskets.
  8. 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).

  4. Install the turbocharger. Refer to Turbocharger Replacement .
  5. Inspect the 2 O-rings on the manifold tube. Replace if damaged.

    6. Object Number: 1335575 Size: SH
  6. Install the intake manifold tube over the dowel pin.
  7. Install the EGR valve cooler tube. Refer to Exhaust Gas Recirculation Valve Cooler Replacement in Engine Controls.
  8. Install the air cleaner layer. Refer to Air Cleaner Replacement in Engine Controls.