2010 Buick Lucerne Owner's Manual - Page 358

3. Squeeze the tabs on each side of the wiper blade assembly and slide the assembly off the end of the wiper arm. 4. Replace the blade assembly with a new one. Allowing the wiper blade arm to touch the windshield when no wiper blade is installed could damage the windshield. Any damage that occurs would not be covered by your warranty. Do not allow the wiper blade arm to touch the windshield. 5. Repeat the steps for the other wiper. 6-56