According to the parts book, GP and MC door seals are the same part number. No guarantees. Also looked up door seals on A1 Auto parts website and both GP and MC came back with 1AWSD00238.
I'm going out on a limb and guessing they're the same. Plus, as GM parts, they're guaranteed to properly fit the car they were made for and your doors will shut properly. 🙂
Yes, the MC & GP use the same seals. I sent him a pm and I would much rather put money into another member's pocket than a retail store