On my 2017 Volt Premier the is a dial for adjusting the panel light brightness/dimness. I understand and can see how it works when the lights are on, but I don't understand what is supposed to happen when you push the button in. It appears to be a 2 position button as well as a dial. I haven't been able to find in the manual anything other than what is on page 153 which discusses what happens when you turn the dial. But it doesn't say anything about pushing the button in or out. Thanks for anyone that can explain this feature to me.