How do you change the top mounted brake light on 2004 gmc Yukon Denali?

To change the top-mounted brake light on a 2004 GMC Yukon Denali, first, open the rear hatch and locate the access panel on the interior side of the liftgate. Remove the screws or clips securing the panel, then carefully pull it off to expose the brake light assembly. Disconnect the wiring harness from the old bulb, twist the bulb socket counterclockwise to remove it, and replace the bulb with a new one. Reassemble by reversing the steps, ensuring everything is securely in place.