After the column went in, I installed the new door gaskets.
The body shop wanted them to fit the doors. They told me I'd probably want to buy new ones because they would get trashed.
I was going to buy the press-on ones from GMCPauls as they got alot of good responses from people that had used them.
But, mine weren't that bad when I cleaned them up. Be patient, glue only as far as you can work, use alot of tape, and, use the 3M black adhesive!
I let them sit overnight till the next afternoon before I took the tape off.