If you're handing your 2020 Traverse off to someone and want to keep your valuables locked away, use this hack to open a secret compartment. What you're going to do is press the button on the far right of your car next to the fast-forward button. This will open the compartment. Press it again to close it. Then, go to settings and hit "valet mode" and type in a four-digit code of your choosing and hit "lock." To unlock it, just type your code back in, and your car will go back to normal.