Removal Procedure

Open the hood.
CAUTION: Refer to Engine Coolant Thermostat Housing Caution .
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle .
Place a drain pan below the vehicle.
Drain the cooling system. Refer to Cooling System Draining and Filling (GE-47716 Fill) and Cooling System Draining and Filling (Static Fill) .
Loosen the radiator inlet hose clamp (2).

Fig 1: Radiator Inlet Hose And Clamp
Courtesy of GENERAL MOTORS COMPANY
Remove the radiator inlet hose (3) from the engine coolant thermostat (1).
Remove the throttle body heater inlet hose (2) from the engine coolant thermostat (1).

Fig 2: Engine Coolant Thermostat Housing, Throttle Body & Heater Inlet Hose
Courtesy of GENERAL MOTORS COMPANY
Remove the heater outlet hose from the engine coolant thermostat housing. Refer to Heater Outlet Hose Replacement (1.8L LUW) and Heater Outlet Hose Replacement (1.8L LWE) .
Remove the heater inlet hose from the engine coolant thermostat housing. Refer to Heater Inlet Hose Replacement (1.8L LUW and LWE) .
Remove the thermostat housing bracket nut.
Remove the thermostat housing bracket.
Disconnect the engine coolant temperature sensor connector (1).

Fig 3: Identifying Engine Coolant Temperature Sensor Connector, Engine Oil Cooler Pipe And Thermostat Housing
Courtesy of GENERAL MOTORS COMPANY
Remove the 2 engine oil cooler pipe bolts (6).
Remove the engine oil cooler pipe (5).
NOTE: Pull the engine oil cooler pipe out of the engine oil cooler.
Remove the engine oil cooler pipe seals (4, 7).
Remove the 4 engine coolant thermostat housing bolts (3).
Remove the thermostat housing (2).
Remove the thermostat housing seal (8).