GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L (LLY) 🢒 Positive Crankcase Ventilation Valve Replacement

Positive Crankcase Ventilation Valve Replacement Driver Side

Removal Procedure

    Object Number: 1334380 Size: SH

    Important: After removing the charged air cooler duct, cover the turbocharger opening with tape in order to prevent entry of objects.

  1. Loosen the charged air cooler inlet duct connector to turbocharger clamp (1).

    2. 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.

  2. Remove the charged air cooler inlet duct connector (4) from the turbocharger.

    3. Object Number: 1336134 Size: SH
  3. Remove the positive crankcase ventilation (PCV) cover screws.
  4. Remove the PCV cover, diaphragm, and spring.
  5. Clean and inspect the cover, diaphragm, and spring.
  6. Discard the diaphragm if damage is found.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1336134 Size: SH
  1. Install the spring, diaphragm, and cover.
  2. Install the PCV cover screws.

    3. Tighten
    Tighten the screws to 4 N·m (35 lb in).


    Object Number: 1334380 Size: SH
  3. Remove the tape from the turbocharger openings.

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

  4. Install the charged air cooler inlet duct connector (4) to the turbocharger.
  5. Tighten the charged air cooler inlet duct connector to turbocharger clamp (1).

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

Positive Crankcase Ventilation Valve Replacement Right

Removal Procedure

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

    3. 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.

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

    4. Object Number: 1334875 Size: SH
  4. Remove the fuel filter bracket bolts.
  5. Position the fuel filter assembly out of the way.

    6. Object Number: 1336134 Size: SH
  6. Remove the positive crankcase ventilation (PCV) cover screws.
  7. Remove the PCV cover, diaphragm, and spring.
  8. Clean and inspect the cover, diaphragm and spring.
  9. Discard the diaphragm if damage is found.

Installation Procedure

    Notice: Refer to Fastener Notice in the Preface section.


    Object Number: 1336134 Size: SH
  1. Install the spring, diaphragm and cover.
  2. Install the PCV cover screws.

    3. Tighten
    Tighten the screws to 4 N·m (35 lb in).


    Object Number: 1334875 Size: SH
  3. Position the fuel filter assembly to the engine.
  4. Install the fuel filter bracket bolts.

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


    Object Number: 1334381 Size: SH

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

  5. install the charged air cooler outlet duct to the intake.
  6. Tighten the charged air cooler outlet duct to intake hose clamp.

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

  7. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement in Engine Controls - 6.6L (LLY).