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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 37 (Engine Mechanical - 6.6L - Off Vehicle Repair Instructions (2 Of 3)) >> Off-Vehicle Repair Instructions (Part 2) >> Valve Rocker Arm Cover Cleaning and Inspection - Lower

Valve Rocker Arm Cover Cleaning and Inspection - Lower

WARNING: This page is about a different variant/trim than selected.
  1. Remove the grommets.
  2. Clean the lower valve rocker arm cover. Remove any sludge or other deposits.
  3. Clean the lower valve rocker arm cover mating surfaces.
  4. Inspect the lower valve rocker arm cover for cracks or other damage.
  5. Inspect the lower valve rocker arm cover mating surfaces for damage.
    Fig 1: Inspecting Lower Valve Rocker Arm Cover
    GM1413510Courtesy of GENERAL MOTORS CORP.
  6. Replace the lower valve rocker arm cover if any damage is found.
  7. Inspect the grommets for damage.
  8. Replace the grommets if any damage is found.
  9. Install the grommets.
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