how do replace my thermostat housing and lower radiator hose

don;t really know what engine you have?remove the housing,remove the hose,take the old one with you to parts house,buy new correct housing,because they have 2 different sizes for your vehicle,replace.

Carefully remove old housing. Buy new replacement. Scrape and clean old base. Install new part. (Use Permatex Sealer). P.S. Be sure to replace Thermostat as well with correct one for your region.