Where is the thermostat on a 2001 Chevy Lumina?

The thermostat on a 2001 Chevy Lumina is located on the engine, typically at the lower part of the engine block, near where the upper radiator hose connects to the engine. However, the exact location might vary slightly depending on the engine size (3.1L V6 or 3.4L V6). You'll need to consult a repair manual specific to your Lumina's engine for a precise location diagram. A picture search online for "[your engine size] Chevy Lumina thermostat location" will likely also yield helpful images.