How do I replace thermostat in a 2004 Yukon SL 4.8 Engine
Monday, January 24th, 2011 AT 6:06 AM
Important: The thermostat is not serviceable separately. The thermostat housing (water pump inlet) and thermostat must be replaced as an assembly.
Remove the radiator outlet hose.
Remove the water pump inlet bolts.
Remove the water pump inlet from the water pump.