Where is the thermostat located on the 2001 deville? Is it easy to replace?:confused:

It is easy to replace. It's at the engine side of the radiator hose. I forget if it is the upper or lower but a quick inspection should tell if no one else chimes in.

If you look at the waterpump housing, there will be a black thermostat housing that has the rad hose going to it. Just remove the bolts for that, and it's there. Very easy to do!

Be sure to use a geniune GM thermostat or exact orig OEM.

Replace thermostat every few years without question or symptoms.

There are circumstances that can cost you an engine $8,000! High price for a 15.00 part.

They are designed to fail . The metal covering of the WAX MOTOR is so thin it develops micrscopic cracks loses wax starts slow failure.

You will find a record of new part numbers for improved thermostats and thermostat housings. Shows we are trying however the industry needs to sell parts lots of parts.

Just do it.