the remote and inside button do not open trunk. fuse is ok. is therer a manual way to get into trunk?
You can try getting to the emergency trunk release handle through the rear seat pass-through. If you can't get it open that way then you're in need of dealer assistance. You might even still be under warranty with it.
Search Buick Lucerne Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Buick Lucerne Experts