I replaced all the weather stripping when I had the car repainted. This was four years ago, and I used all GM parts.
Here are the part numbers:
* 20201221 list price = 76.40 weather strip
(T-top weather strip up A post and around and down to B post)
* 20201220 list price = 76.40 weather strip
(T-top weather strip up A post and around and down to B post)
* 20217186 list price = 40.70 weather strip asm
(T-top weather strip along the edge that mates to window)
* 20217187 list price = 76.40 weather strip
(T-top weather strip along the edge that mates to window)
* 20139617 S/str list price price = 19.00 each, and you will need 2 of them
(Foam seal that is mounted to the car roof and is
Shaped like an “L” when installed)
* 202011820 list price = 106.40 weather strip
(Door weather striping)
* 202011821 list price = 106.40 weather strip
(Door weather striping)
*25558394 list price price = 34.78 weatherstr
(Trunk seal)
I did some bargaining at the GM garage and got all the above-mentioned items for under 400 dollars, but that was about four years ago. All the parts fit great, of course, hope this helps.
