GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 2007 🢒 Sierra Denali 🢒 Engine 🢒 Engine Controls and Fuel - 6.6L (LMM) 🢒 Engine Coolant Thermostat Housing Cleaning and Inspection

    Object Number: 663758 Size: SH
  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.