This direct replacement drum brake wheel cylinder was specifically engineered to match the fit, function and performance of the original wheel cylinder on particular vehicles. It is manufactured and tested for quality assurance. This part is compatible with the following vehicles. Before purchasing, enter your vehicle trim in the garage tool to confirm fitment. [Buick Century: 1978, 1979, 1980, 1981] - [Buick Regal: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987] - [Chevrolet Camaro: 1982, 1983, 1984, 1985, 1986, 1987, 1988] - [Chevrolet Cutlass: 1986, 1987] - [Chevrolet El Camino: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987] - [Chevrolet Malibu: 1978, 1979, 1980, 1981, 1982, 1983] - [Chevrolet Monte Carlo: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988] - [Chevrolet S10 Blazer: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991] - [Chevrolet S10: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991] - [GMC Caballero: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987] - [GMC S15 Jimmy: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991] - [GMC S15: 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990] - [GMC Sonoma: 1991] - [GMC Syclone: 1991] - [Oldsmobile Bravada: 1991] - [Oldsmobile Cutlass Calais: 1978, 1979, 1980, 1981, 1982, 1983, 1984] - [Oldsmobile Cutlass Cruiser: 1980, 1981, 1982, 1983] - [Oldsmobile Cutlass Supreme: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988] - [Oldsmobile Cutlass: 1978, 1979, 1980, 1981, 1985, 1986] - [Pontiac Bonneville: 1982, 1983, 1984, 1985, 1986] - [Pontiac Firebird: 1982, 1983, 1984, 1985, 1986, 1987, 1988] - [Pontiac Grand Am: 1978, 1979, 1980] - [Pontiac Grand LeMans: 1978, 1979, 1980, 1981] - [Pontiac Grand Prix: 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987] - [Pontiac LeMans: 1978, 1979, 1980, 1981]