This is a Door Window Channel for 1973-1980 Chevrolet & GMC Trucks. See manufacturer's installation video: Click here to view Specific Applications: 1973 - 1974 Chevrolet - C10 Pickup 1973 - 1980 Chevrolet - C10 Suburban 1973 - 1974 Chevrolet - C20 Pickup 1973 - 1980 Chevrolet - C20 Suburban 1973 - 1974 Chevrolet - C30 Pickup 1973 - 1974 Chevrolet - K10 Pickup 1973 - 1980 Chevrolet - K10 Suburban 1973 - 1974 Chevrolet - K20 Pickup 1973 - 1980 Chevrolet - K20 Suburban 1973 - 1974 Chevrolet - K30 Pickup 1973 - 1974 GMC - C15/C1500 Pickup 1973 - 1974 GMC - C15/C1500 Suburban 1973 - 1974 GMC - C25/C2500 Pickup 1973 - 1974 GMC - C25/C2500 Suburban 1973 - 1974 GMC - C35/C3500 Pickup 1973 - 1974 GMC - K15/K1500 Pickup 1973 - 1974 GMC - K15/K1500 Suburban 1973 - 1974 GMC - K25/K2500 Pickup 1973 - 1974 GMC - K25/K2500 Suburban 1973 - 1974 GMC - K35/K3500 Pickup 1975 - 1980 Chevrolet - C10 1975 - 1980 Chevrolet - C20 1975 - 1980 Chevrolet - C30 1975 - 1980 Chevrolet - K10 1975 - 1980 Chevrolet - K20 1975 - 1978 GMC - C15 1975 - 1978 GMC - C15 Suburban 1975 - 1978 GMC - C25 1975 - 1978 GMC - C25 Suburban 1975 - 1978 GMC - C35 1975 - 1978 GMC - K15 1975 - 1978 GMC - K15 Suburban 1975 - 1978 GMC - K25 1975 - 1978 GMC - K25 Suburban 1976 - 1980 Chevrolet - K5 Blazer 1976 - 1980 GMC - Jimmy 1977 - 1980 Chevrolet - K30 1977 - 1978 GMC - K35 1979 - 1980 GMC - C1500 1979 - 1980 GMC - C1500 Suburban 1979 - 1980 GMC - C2500 1979 - 1980 GMC - C2500 Suburban 1979 - 1980 GMC - C3500 1979 - 1980 GMC - K1500 1979 - 1980 GMC - K1500 Suburban 1979 - 1980 GMC - K2500 1979 - 1980 GMC - K2500 Suburban 1979 - 1980 GMC - K3500