1967 - 1972 GMC K25/K2500 Pickup Rear Window Weatherstrip Seal, With Trim Groove For Steel Trim. This rear window seal fits the large rear window. This application goes first on the glass and is installed using the rope-in method. The trim groove requires you to re-use your chrome trim. Made from ozone resistant EPDM rubber and from the same OE specs as the original for an authentic fit and finish.