Thermostat and Sensor

I have a '96 Grand Am, 3.1 6 cylinder. Does anyone know where the thermostat or sensor are located? Car is starting to overheat and I need to find them. Also, how likely is it that my radiator is clogged? just replaced it in november. thanks.

the thermostat is on the drivers side of the engine, just follow your upper radiator hose to the engine and it's under the aluminum housing the hose hooks to. the coolant temp sensor(the one for the computer) is just below the t-stat housing toward the back of the engine, the sensor for the guage is located in the rear cylinder head toward the drivers side, and should have a green wire about 8-10" long coming from it.

Thanx, I appreciate it.