At least anther 5 years till the next Dexcool change!!

 

Thank you everybody for the help! Yes, by "whole" i just meant the thermostat itself, sorry for the confusion

 

Some cars have the t-stat and housing all in one, that gets to be $80 for a t-stat expensive. In the case of the Ecotec engine the rubber gasket is supposed to come in the box with the t-stat, but most countermen will try to sell one anyway.