The reservoir is backing up with coolant and getting boiling hot?

Hi,

The thermostat would be the first thing I replaced. However, when I would have it apart, I would take the opportunity to flush the cooling system at the same time. That way, you don't waste coolant.

Here is a link that explains how to flush the system:

https://www.2carpros.com/articles/coolant-flush-and-refill-all-cars

If you look below, I attached the directions for replacing the thermostat specific to this vehicle. I assume this vehicle has a 3.2L V6. If that is wrong, let me know.

Let me know if this helps or if you have other questions.

take care,

Joe

See pics below. Also, make sure to check hoses to make sure they are in good condition.