Pull the rear door opening weatherstrip from the door opening pinch-weld flange. Use 3M Release Agent or the equivalent at the bottom ends of the rear door opening weatherstrip if needed.
Apply weatherstrip adhesive into the channel on the rear door opening weatherstrip. Use GM P/N 12345097 (Canadian P/N 10953479) or the equivalent.
Start at the corners and align the rear door opening weatherstrip to the door opening pinch-weld flange.
Align the channel on the rear door opening weatherstrip with the pinch-weld flange.
Important: When installing the rear door opening weatherstrip, ensure that the corners have not pulled away from the body.
Press the weatherstrip into place. If you are reinstalling the original weatherstrip, use GM weatherstrip adhesive GM P/N 12345097 (Canadian P/N 10953479) at the bottom ends of the rear door opening weatherstrip in order
to retain the weatherstrip to the body.
Install the retainers in the ends of the rear door opening weatherstrip into the holes in the floor panel.