Cooling System

• The cooling system keeps your engine from overheating during operation by opening and closing a temperature-sensitive valve in response to changing coolant temperatures.
  
  

Radiator

• The radiator -- a large, rectangular-shaped part -- sits behind the grill at the very front of the Escalade's engine. Radiators and heating/cooling systems of recently driven vehicles can be hot; let the engine cool for at least three hours before touching it.
  
  

Upper Radiator Hose

• At the top of the radiator, a large rubber hose leads out towards the engine, to carry radiator fluid to the engine block.
  
  

Thermostat Housing

• As the upper radiator hose meets the engine block, a dome-shaped housing contains the thermostat. You cannot actually see the thermostat until you remove the housing.
  
  

Considerations

• Don't confuse the heating and air conditioning system for the thermostat. You'll find temperature controls for the interior of the vehicle -- correctly referred to as the climate controls -- on the dash. For a detailed diagram showing the thermostat's location, purchase the factory service manual for your year and model Escalade.