2000 GMC Jimmy Thermostat

Remove the necessary coolant from the radiator. Refer to Draining and Filling Cooling System. Remove the air outlet duct. Refer to Air Cleaner Outlet Duct Replacement. Remove the throttle body bracket. Refer to Throttle Body Assembly Replacement. Remove the thermostat housing mounting bolts.

Remove the thermostat housing from the lower intake manifold and set aside. Remove the gasket or O ring. Remove the coolant thermostat. Clean all the sealing surfaces of the coolant outlet. Clean the sealing surface on the lower intake manifold.