Where is the thermostat located on a 2000 Cadillac DeVille?

On a 2000 Cadillac DeVille, the thermostat is located in the engine compartment, specifically at the engine's coolant outlet. To access it, you typically need to remove the upper radiator hose and the thermostat housing, which is usually bolted to the engine. It's advisable to consult the vehicle's service manual for specific details and diagrams.