What is the procedure for changing a cooling system thermostat on a 1997 Buick Skylark with a 3.1L engine?

first drain the fuild then locate the tremostat housing remove the return hose which is top port on raditor. Unbolt the housing romove old gasket lay gasket sealent on the gasket both side but make sure you already remove the termostat and replace with new and then install gasket then tighten the housing hand tight install hose to the termostat housing a tighten the clamp for the hoses and replace fuild that was been removed or reuse if not dirty and start and run car or truck at idle speed and check for leaks