Like was said, work the grommet out of the hole with prying and patience. Lift the facing lip of the grommet to get between the hole edge and the grommet and work the grommet and lamp out. In my 2011 BH, the lamp is a unit with no replaceable bulb. The unit gets replaced. Before replacing the lamp, check the lamp connector first, make sure it is well seated, then check light operation.
I replaced my four with led lamps. Just something I wanted to do.