Thermostat Replacement

Removal Procedure

^ Tools Required
- J 38185 Hose Clamp Pliers





1. Carefully remove the throttle body air inlet duct. Refer to Air Cleaner Assembly Replacement in Powertrain Management.
2. Partially drain the coolant. Refer to Draining and Filling Cooling System.
3. Use the J 38185 in order to reposition the hose clamp at the thermostat housing. Disconnect the radiator hose from the thermostat housing.
4. Remove the thermostat housing attaching bolts.





5. Remove the thermostat housing and gasket.





6. Remove the thermostat.
7. Clean the mating surfaces.

Installation Procedure





1. Install the thermostat.





2. Install the thermostat housing and gasket to intake manifold.

Notice: Refer to Fastener Notice in Service Precautions.





3. Install the bolts to the housing with RTV sealer GM P/N 1052366 or the equivalent.
Bolts to 25 Nm (18 ft. lbs.).
4. Connect the radiator hose to the thermostat housing. Use the J 38185 in order to reposition and install the hose clamp at the thermostat housing.
5. Carefully install the throttle body air inlet duct. Refer to Air Cleaner Assembly Replacement in Powertrain Management.
6. Fill the cooling system with engine coolant. Refer to Draining and Filling Cooling System.
7. Inspect for leaks.