To get accurate instructions, you need to specify the exact model of your 2001 Buick.
Once you provide the model, I can try to find a repair manual or video tutorial to guide you through the process. Alternatively, searching online (YouTube, for instance) for "[Your Buick Model] 2001 taillight replacement" should yield helpful results.
In general, the process usually involves:
1. Locating the access panel: This is often inside the trunk or behind interior trim panels.
2. Removing access panel(s): This might involve unscrewing fasteners or carefully popping off clips.
3. Disconnecting the electrical connector: Gently unplug the connector to the taillight assembly.
4. Removing the taillight assembly: This may involve unscrewing fasteners or carefully releasing clips holding the light in place.
5. Installing the new taillight: Reverse the removal process.
6. Reconnecting the electrical connector: Ensure the connector is securely plugged in.
Remember to always disconnect the negative terminal of your car battery before starting any electrical work to avoid short circuits.