GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L (LLY) 🢒 Intake Manifold Tube Replacement

Removal Procedure

    Object Number: 1334381 Size: SH
  1. Remove the intake manifold cover. Refer to Intake Manifold Cover Replacement .
  2. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 6.6L (LLY).
  3. Loosen the charged air cooler outlet duct to intake hose clamp.

    4. Important: Do not use a screwdriver or other tool to pry the hose loose. The hose can be torn or damaged. Loosen the hose by twisting.

  4. Remove the charged air cooler outlet duct from the intake.

    5. Object Number: 1335476 Size: SH
  5. If necessary, remove the tie strap from the electrical harness.
  6. Reposition the harness clip from the intake manifold tube, as needed.

    7. Object Number: 1335562 Size: SH
  7. Remove the air inlet tube to intake manifold tube bolt and nut.

    8. Object Number: 1335564 Size: SH
  8. Remove the air inlet tube nuts.
  9. Remove the air inlet tube.

    10. Object Number: 1335575 Size: SH
  10. If necessary, remove the intake manifold tube.
  11. If necessary, remove and discard the 2 O-ring seals from the tube.
  12. Clean the gasket surfaces of the exhaust gas recirculation (EGR) cooler tube, intake manifold tube and inlet tube.

Installation Procedure

    Object Number: 1335575 Size: SH
  1. If necessary, install NEW O-ring seals onto the tube.
  2. If necessary, install the intake manifold tube.

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


    Object Number: 1335564 Size: SH
  3. Install the air inlet tube and NEW gaskets.
  4. Install the air inlet tube nuts.

    5. Tighten
    Tighten the nuts to 25 N·m (18 lb ft).


    Object Number: 1335562 Size: SH
  5. Install the air inlet tube to intake manifold tube bolt and nut.

    6. Tighten
    Tighten the bolt/nut to 10 N·m (89 lb in).


    Object Number: 1335476 Size: SH
  6. If necessary, install a NEW tie strap over the electrical harness.

    7. Object Number: 1334381 Size: SH

    Important: Lubricate the end of the duct prior to installation.

  7. Install the charged air cooler outlet duct to the intake.
  8. Tighten the charged air cooler outlet duct to intake hose clamp.

    9. Tighten
    Tighten the clamp to 6 N·m (53 lb in).

  9. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 6.6L (LLY).
  10. Install the intake manifold cover. Refer to Intake Manifold Cover Replacement .