You ll need to 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.
How to take a 2003 buick century door panel.
Put a screwdriver around the edges and pry it and the door panel should come off.
You ll need to lift the door panel upwards in order to get it off the window ledge.
As you do this you ll need to reach behind it to disconnect the armrest controls.
Loosen the panel from the bottom then tilt it out and lift it up out of the window channel.
Install the upper edge of the trim panel to the top edge of the inner door panel pressing down firmly until the trim panel is fully seated.
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Remove right rear door panel 2003 buick lasabre.
2003 buick century 60 00.
Install the new retainers to the front door trim panel.
There should be screws in armrest remove that and maybe remove inside door handle.
Route the electrical connectors through the trim panel.
After the panel is out there may or may not be a plastic sheet glued to the door frame which you ll have to pry loose it can restick to the glue so try not to tear it.
There are plastic clips all around the panel that hold it in.
Press rearward to release the mounting plate retainer and lift up on the front of the plate.
Once that is off you can remove the door handle and replace it.
Here is a guide that will help you.
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You have to remove the door panel not easy but do able.
Starting at the door bottom use a screwdriver or a flat blade screwto release the door trim panel retainers inster the screw driver between the door panel and the door and pry outwards.