So I didn't find any thread pointing out this button within "Fuel Economy" so I am just going to place this thread in here. In my Aveo 1.2 LS there is an Eco-button. Which doesn't seem to be present in the LT version of the car (from 2013).
As far as I've noticed till so far, the Eco-button only enables or disables the Start/Stop system. But besides this effect, I didn't notice any other plus-sides with this button. Mileage seem to be steady with or without the button turned on. (On being the button lid green).
Anyone experiencing the same ?