How do you fix the bck window in a 2008 Buick lucerne cxl?

To fix the back window in a 2008 Buick Lucerne CXL, first check the fuse related to the power Windows to ensure it's not blown. If the fuse is fine, remove the door panel to access the window motor and regulator. Inspect for any mechanical obstructions or damage to the components, and replace the faulty parts as needed. Reassemble the door panel and test the window operation before putting everything back together.