* GM's website: While not always guaranteed to be available for older models, it's worth checking the Buick section of the official General Motors website. They may have a downloadable PDF version.
* eBay or Amazon: Search these sites for "2006 Buick Lucerne owner's manual." You'll likely find both physical copies and digital downloads. Be aware that prices can vary.
* Used bookstores or online used booksellers: These are good options for finding physical copies.
* Repair manuals websites: Sites specializing in repair manuals sometimes also offer owner's manuals. Look for sites dedicated to GM or Buick vehicles.
* Your local library: Your library might have access to digital versions of owner's manuals or might be able to help you find a physical copy through interlibrary loan.
Remember to specify "2006 Buick Lucerne" in your search to avoid getting manuals for other years or models. If you're buying a used copy, check the condition carefully before purchasing.