The service manual says you just pull it out
1.Disconnect and isolate the battery negative cable.
2.Remove the two screws (1) that secure the Center High Mounted Stop Lamp (CHMSL) (3) to the rear roof header panel.
3.Pull the CHMSL away from the opening in the roof header far enough to access and disconnect the headliner wire harness connector (4) from the pigtail connector on the back of the lamp housing.
4.Remove the CHMSL from the roof header.
