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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) >> Thermostat Housing Cleaning and Inspection

Thermostat Housing Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Clean the thermostat housing.
  2. Clean the thermostat housing mating surfaces.
    Fig 1: Inspecting Thermostat Housing Mating Surfaces
    GM663758Courtesy of GENERAL MOTORS CORP.
  3. Inspect the thermostat housing for cracks.
  4. Inspect the thermostat housing mating surfaces for damage.
  5. Replace the thermostat housing if any damage is found.
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