How do you remove thermostat housing on 1998 Pontiac transport?

To remove the thermostat housing on a 1998 Pontiac Transport, first, ensure the engine is cool and disconnect the negative battery cable. Drain the coolant from the radiator and remove any components obstructing access to the housing, such as the air intake duct. Unscrew the bolts securing the thermostat housing and carefully lift it off, taking care not to damage the gasket. Finally, remove the old thermostat and clean the mating surfaces before installing the new thermostat and housing.