What does eco button do on chevy equinox?

The Eco button on the Chevy Equinox is designed to help increase the fuel economy for the vehicle. The function on the car is made to lock the torque converter up at lower speeds which will also change the shift timing of the transmission. This will help with the fuel consumption by lowering the RPMS of the car. Most consumers have said there is not a real difference in the way it performs while driving in the city with stop and go traffic but it will make a difference on long road trips or heavy highway driving. You may notice a difference when You press the gas pedal as it will try to keep the RPMs so that You do not use as much fuel during the acceleration.