Like Guz said, pop the trunk open and you might have to remove the carpet from behind the light, can't remember, but just try twisting to the left, once it stops, pull it out and you might need to wiggle it while pulling on it.
If trying to twist the bulb to the left doesn't turn it, then go the other way!
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charlie
black 98 gtp sedan, 222,000 and running great with the new used tranny!
zzp 3" d/p aluminized
dhp 1.0