Where is thermostat for 2002 Pontiac firebird?

The thermostat for a 2002 Pontiac Firebird is located in the engine's cooling system, specifically at the end of the upper radiator hose where it connects to the engine. To access it, you'll need to remove the upper radiator hose and the thermostat housing, which is typically secured by bolts. Once removed, you can replace the thermostat. Always ensure the engine is cool before attempting this procedure.