Yukon 4WD V8-5.3L (2008)
Heater Hose: Removal and Replacement
Auxiliary Heater Inlet and Outlet Hose Connector Retainer and Seal Replacement
Auxiliary Heater Inlet and Outlet Hose Connector Retainer and Seal Replacement
Removal Procedure
1. Drain the cooling system. Refer to Cooling System Draining and Filling (Static Fill).
2. Before removing the quick connect fitting from the vehicle, clean area and remove any loose dirt or debris.
3. Remove the fitting from the tube by squeezing the retainer clip legs together and pulling the fitting from the tube.
4. Remove the retainer from the tube by folding the legs back on themselves and sliding the retainer clip out of the tube (1).
5. Place a flat-blade tool through the window of the quick connect fitting to just below the outer bushing and above the top O-ring (2).
Notice: Do NOT damage the fitting while removing the outer bushing. Damage may affect the seal integrity and cause a coolant leak.
6. Remove the outer bushing with a gentle prying motion. Discard the outer bushing.
7. Remove other components and discard.
8. Thoroughly clean and inspect the inside surface of the fitting for nicks, scratches or cracks.
Remove any dirt or debris using water and a lint free cloth.
Installation Procedure
1. Lubricate O-rings with coolant.
