I would try to find some GM NOS ones if you can find them...post in the Parts Wanted section...I've seen some of the aftermarket seals and wasn't impressed...I have one GM NOS side...have to check which side that I'll sell...the only issue is that it's been folded in a box for a long time so there are a few creases in the rubber...the rubber is still soft and there are no cracks...I imagine the creases would come out once it's installed and the glass has pushed down on it for awhile...