GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2008 🢒 Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L 🢒 Intake Manifold Replacement - Left Side

Removal Procedure

    Object Number: 1335935 Size: SH
  1. Remove the center intake manifold. Refer to Center Intake Manifold Replacement.
  2. Remove the glow plug module and bracket. Refer to Glow Plug Control Module Replacement.
  3. Remove the left fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement - Bank 1.
  4. Remove the intake manifold bolts/nuts.

    5. Important: The intake manifold uses sealer. Pry at the area by the fuel rail bolt holes in order to avoid damage to the sealing surfaces.

  5. Remove the intake manifold.
  6. To prevent entry of debris in the cylinder head tape the openings.
  7. If required, clean and inspect the intake manifold. Refer to Intake Manifold Cleaning and Inspection.

Installation Procedure

    Object Number: 663817 Size: SH
  1. Apply a 2-3 mm (1/8 in) wide, by 0.5-1.5 mm (1/16 in) high bead of sealant to the intake manifold. Refer to Adhesives, Fluids, Lubricants, and Sealers for the correct part number.

    2. Object Number: 1335935 Size: SH
  2. Install the intake manifold.
  3. Install the intake manifold bolts/nuts.

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


    Object Number: 654532 Size: SH
  4. Tighten the intake manifold bolts/nuts in the sequence shown.

    5. Tighten
    Tighten the bolts/nuts to 21 N·m (15 lb ft).

  5. Install the left fuel rail. Refer to Fuel Injection Fuel Rail Assembly Replacement - Bank 1.
  6. Install the glow plug module and bracket. Refer to Glow Plug Control Module Replacement.
  7. Install the center intake manifold. Refer to Center Intake Manifold Replacement.