Yukon 2WD V8-5.3L VIN T (2006)
5. Connect the heater and surge tank hoses to the heater core.Firmly push the quick connect onto the heater core pipe until you hear an audible click.
6. Install the radiator outlet hose to the radiator.
7. Fill the cooling system. Refer to Draining and Filling Cooling System in Cooling System.