Changing a thermostat on a 1995 Jeep Cherokee is very easy to do. The thermostat has two bolts holding it in place. Take the bolts off and remove the thermostat from the casing and replace with a new one.
Drain the water from your 1995 Chevrolet Corsica cooling system. Remove the water supply hose from the top of your thermostat housing. Remove the thermostat housing retaining bolts. Lift the old thermostat out and drop in the new thermostat.