According to a recent article published by GM-Trucks.com, the hulking GMC Hummer EV has a "mystery" button. While mystery buttons are more common on cars than you may think, this particular button is a different story.
You've probably pushed something in your car that appears to be a button, though it's inactive or just a "dummy." This is sometimes because your car doesn't have a feature that's available in upper trims or as an extra. My wife's Honda Odyssey has several inactive buttons, which drove us crazy when she first bought it.
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