on my '98 there are two round panels that pop out of the molding back there. under each panel is a knob that you turn (righty tighty left loosey) to loosen a spring type mechanism that holds the light fixture in place. then the sometimes tough part... the light can be challenging to pull out. I use a standard screw driver and pry it out, but be careful because you can scratch the paint very easy... sometimes it comes out easy just by prying with my fingers.
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