: where is the thermostat located in 2003 deville

05-27-06, 06:00 PM
where is thermostat located on 03 deville

05-27-06, 08:41 PM
I want to say it's the upper hose but I am not sure. It should be obvious by looking at it though.

05-28-06, 11:44 AM
It's where the radiator OUTLET hose connects to the engine. The outlet hose is the one on the drivers side of the radiator, about half way down. The inlet hose is the one on the other side, at the top, of the radiator. The thermstat housing sits on the water pump housing.