Where is thermostat located on 2001 chevy tracker

What is your question?

Car overheated do to I think low on oil i changed oil month or so ago I thought I put enough oil in vehicle it checked ok when oil level was checked. it runs and there is no other noise that it should not make while engine is running it did make a rattling/ clunky noise when it was overheating but has not made it since I added oil and have ran engine for about 10 mins and temp gauge inside car almost rises to the red I turn it off before reaching red in gauge is thermos stat easy to replace and where is it located