Yukon/Denali 2WD V8-4.8L VIN V (2005)
Thermostat Housing: Service and Repair
Thermostat Housing Replacement (4.8L, 5.3L, and 6.0L Engines)
Removal Procedure
Important: The thermostat is not serviceable separately. The thermostat housing (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 from the water pump.
Installation Procedure
1. Install the water pump inlet to the water pump.
Notice: Refer to Fastener Notice in Service Precautions.
2. Install the water pump inlet bolts.
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Tighten the bolts to 15 Nm (11 ft. lbs.).
3. Install the radiator outlet hose.