SMP TM-45 Standard Automatic Transmission Vacuum Modulator fits 1981 - 1979, 1977 - 1976 Buick Century; 1982 - 1977 Buick Electra; 1982 - 1980, 1977 - 1976 Buick Estate Wagon; 1983 - 1976 Buick LeSabre; 1983 - 1976 Buick Regal; 1980, 1978 - 1977 Buick Riviera; 1976 - 1975 Buick Skyhawk; 1976 Buick Skylark; 1980 Cadill