2002 Buick Regal Tail Light

You need to install the tail lamp bulbs to the sockets, the tail lamp sockets to the tail lamp housing, apply light pressure to the lens to retain the lamp in position, install the tail lamp assembly plastic wingnut retainers, the corner of the rear compartment trim panel into position, the remaining tail lamp plastic wingnut retainer and the rear compartment convenience net, and close the rear compartment.

You need to open the rear compartment, remove the rear compartment convenience net and the visible plastic wingnut, pull back the corner of the rear compartment trim panel, apply light pressure to the tail lamp lens to retain the lamp in position, remove the remaining plastic wingnuts and the tail lamp assembly, rotate the lamp sockets counterclockwise, and remove the tail lamp housing assembly and the tail lamp bulbs.