WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
Pull the roof drip weatherstrip from the door opening frame.
Remove any remaining weatherstrip material or adhesive.
Fig 1: Pulling Roof Drip Weatherstrip From Door Opening Frame