Where is the thermostat located on a 1997 Pontiac grand am se 2.4l engine?

The thermostat on a 1997 Pontiac Grand Am SE with a 2.4L engine is located at the back of the engine, on the intake manifold. It's not easily accessible without some disassembly. You'll likely need to remove some hoses and possibly other components to reach it. A repair manual specific to your vehicle year and engine would be highly recommended to guide you through the process.