If you are sure that's what caused the light to come on, you could disconnect the battery negative cable, wait a few seconds and hook it back up. But make sure you have the security code for the radio before hand if it needs one.
How Do I Turn Off The Check Engine Light On My Impala 2004 After Leaving The Fuel Filler Cap Off?
You can also remove the ECM fuse from the fuse box for a few seconds and then replace it. Doing this you don't lose any of the memory setting to your accessories.
Use a scanner if you don't have one an evap code is a 2 trip code so make sure your gas cap is on tight and after 2 trip meaning you drive the car normal from cool start to full warmed up 2 times and the light will go off make sure you have a full tank of gas because the evap monitor will only run if there is more than a half tank of fuel