How do I remove the door panel of a 2011 Buick Regal, driver's side door?

Most of the time this is caused by a driver's side master switch issue. See this post on how to test and determine whether it's the switch or the motor

https://ricksfreeautorepairadvice.com/window-goes-up-but-not-down/

Most are the pins around, near handle could be screwed and caps like light look for them.

Usually, yes. You should be able to get to the mounting bolts by removing the upper trim panel, but the electrical connector is behind the door panel.

If that model has a fold down section of the rear seat back, the manufacturer normally installs an accessible manual boot release tab in the vicinity of the fold down seat section just inside the trunk compartment.

If there is no fold down seat in that model or no manual boot release inside the trunk area, the rear seat needs to be removed so that you can access the trunk from inside the car.

I just did a 97 Regal yesterday and yes you are correct...the strip must be removed to gain access...depending on model you may have to remove the cushioning panel (piece of upholstery panel) on the inside of trunk lid...follow this video URL as it explains the removal better in video form than written..basically remove the 7 10mm nuts holding panel on, lower trunk lid a little and wiggle panel off, twist socket and remove to gain bulb access..install is reverse procedure ...Regal, Century and LeSabre are all same idea/setup Tail Light Change 1997 2005 Buick Century 2004 Buick Century Custom 3 1L V6

• In the door handle "finger well" remove the plastic cover with a screw driver.
• Remove 2 screws (they may be torx or regular hex bolts).
• Remove Philips screw from behind the inside door opener lever.
• slightly and slowly, pull back on the plastic triangle that is on the back side of the outside rear view mirror. It will stay attached to the door panel, but you need to release the catch nipple from the door.
• Now, pull out on the edges all around the bottom, front, and back of the door panel ( you may need a putty knife or something similar to get your fingers in and start pulling).
• once the door is loose, lift up slowly on the door panel until it is free of the door (don't pull too hard or far as there are still 3 wire bundles attached).
• Unclip the door light plug on the back and the locks and windows switch plugs towards the front.
• Reverse for install.

there are screws you have to remove. make sure you've found and removed all of them. then the door is held in with clips from the back side. work a pry bar or a long flat screw driver around the edges to pop them loose then you should be able to get your hands behind it to find the other clips. in some cases the handles have to come off before the panel can be removed

either both outside door handles are broken or door handle linkages are loose. remove door panel for visual inspection and verify

On the inside trim, you can remove screws that are by the door handle, arm rest, under door and side of door and then gently pull back on the panel as there will also be retaining clips attached and you don't want to break them. You'll need to lift the door panel upwards in order to get it off the window ledge. Then you'll need to manipulate the panel and disconnect the door handle linkage from the door handle and disconnect the wiring for your controls. Then you can access the bolts that secure the mirror onto the door