The Eldorado is shown. The DeVille is similar.

1. Remove the fasteners retaining the sealing strip (1) to the door.
2. Remove the sealing strip (1).

1. Install the sealing strip (1) to the door.
2. Align the fasteners in the sealing strip (1) to the holes in the door bottom (2).
3. Engage the fasteners using a rubber mallet.