Where is the thermostat located on a 2003 Chevrolet Impala 3.4l?

Answer 1

The thermostat is located at the engine end of the upper radiator hose. ------------------------------------------------------------------------------------------- On the 3.4l v6 engine, you will need to remove the throttle body assembly to get the the 2 housing bolts. You are suppose to remove the exhaust crossover to access the bolts, but removing the throttle body gives enough room.- TechJK Absolutely correct... however you forgot to remind the user to make sure they purchase a new Throttle body gasket as well as a thermostat... Changed mine a week ago and caused a MAJOR vacuum leak by not changing it. Gasket is only a Buck-Fifty or so.