1975 - 1978 GMC C25 Suburban Door Weatherstrip Seal Kit, Glassruns, Beltlines and Door Seals. Left and Right, 10 Piece Kit. Door kit consists of: Door seals, beltlines and glass run channels. This kit is for the left and right front doors. Our product is made from the original specs and from high quality ozone resistant materials to fit your vehicle.