Where is the thermostat located on a 2004 Pontiac Grand Am GT?

The thermostat on a 2004 Pontiac Grand Am GT is located on the engine, typically at the lower part of the engine block, near the water pump. It's not easily accessible without some mechanical knowledge and tools. You'll likely need to consult a repair manual specific to your vehicle's engine (2.2L or 3.4L were common in this model) for precise location and removal instructions. A diagram in the repair manual will be invaluable.