Buick 1994 Century Owner's Manual page 237

Taillight Bulb Replacement (Wagon)
For the type of bulb, see the Index under "Replacement
Bulbs."
1. Open the liftgate.
2. Remove the three Phillips head screws.
3. Pull the taillight housing away from the body of the
vehicle.
4. Press the bulb housing release lever and turn the
housing 1/6 turn counterclockwise to remove it.
5. To remove the bulb, push in and rotate
it
counterclockwise.
6. Reverse
all steps to reassemble the taillight.
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