1968 - 1970 GMC K25/K2500 Suburban Windshield Weatherstrip Seal With Trim Groove For Steel Trim. This windshield seal goes first on the glass and is installed using the rope-in method. The trim groove requires you to re-use your 5/8 deep centered chrome trim. Made from ozone resistant EPDM rubber and from the same OE specs as the original for an authentic fit and finish.