Sierra Classic 2500 4WD V8-6.0L (2007)
Thermostat Housing: Service and Repair
Engine Coolant Thermostat Housing Replacement (4.8L, 5.3L, and 6.0L Engines)
Removal Procedure
Important: The thermostat is not serviceable separately. The water pump inlet and thermostat must be replaced as an assembly.
1. Remove the radiator outlet hose.
2. Remove the water pump inlet bolts.
3. Remove the water pump inlet and thermostat from the water pump.
Installation Procedure
1. Install the thermostat and thermostat housing to the water pump.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the thermostat housing bolts.
Tighten the bolts to 15 Nm (11 ft. lbs.).
3. Install the radiator outlet hose.
