GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2005 🢒 GMC C Sierra - 2WD 🢒 Engine 🢒 Engine Mechanical - 6.6L (LLY) 🢒 Valve Rocker Arm Cover Cleaning and Inspection - Upper

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

    3. Object Number: 1336135 Size: SH
  3. Clean the upper valve rocker arm cover. Remove any sludge or other deposits.
  4. Clean the upper valve rocker arm cover mating surface.
  5. Inspect the upper valve rocker arm cover for cracks or other damage.
  6. Inspect the upper valve rocker arm cover mating surfaces for damage.
  7. Replace the upper valve rocker arm cover if any damage is found.

    8. Object Number: 1336134 Size: SH
  8. Inspect the PCV cover, diaphragm, and spring for damage.
  9. Install the PCV spring.
  10. Install the PCV diaphragm.
  11. Install the PCV cover.

    12. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  12. Install the PCV cover screws.

    13. Tighten
    Tighten the PCV cover screws to 4 N·m (35 lb in).