How do you replace thermostat in Cadillac SRX?

To replace the thermostat in a Cadillac SRX, first ensure the engine is cool and disconnect the negative battery terminal. Then, drain the coolant from the radiator and remove any components obstructing access to the thermostat housing, typically located near the engine. Unbolt the thermostat housing, remove the old thermostat, and clean the mating surfaces before installing the new thermostat and gasket. Finally, reassemble everything, refill the coolant, and reconnect the battery.