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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1075 (Engine Mechanical - 6.6L (4 Of 5)) >> Off-Vehicle Repair Instructions (3 Of 4) >> Engine Coolant Thermostat Housing Cleaning and Inspection

Engine Coolant Thermostat Housing Cleaning and Inspection

WARNING: This page is about a different car, the 2008 GMC Sierra, 2008 GMC Cab & Chassis Sierra, 2008 Chevrolet Silverado, and 2008 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Thermostat Housing Inspection Areas
    GM663758Courtesy of GENERAL MOTORS CORP.
  1. Clean the thermostat housing.
  2. Clean the thermostat housing mating surfaces.
  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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