This Gates Radiator Cap Tester Adapter fits your 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 Pontiac Grand Am 2.0L 2.3L 2.5L 3.0L 3.8L 4.9L 5.0L 5.7L 6.6L 7.5L L4 V6 V8 and is perfect for a tune up or performance upgrade. .
