This is a new reproduction 15lb AC radiator cap to fit many 1957-1987 GM Buick, Cadillac, Chevrolet, Pontiac and Oldsmobile vehicles.
Buick:
1957-1968: All models except 1963 Invicta & Wildcat with A/C.
1969: All models except vehicles with coolant recovery.
1961-1972: Skylark & GS models, except vehicles with coolant recovery.
Cadillac:
1960: Cadillac all models with A/C.
1961-1968: Cadillac all models except vehicles with coolant recovery.
Oldsmobile:
1957-1960: Oldsmobile all models with A/C.
1961-1973: Oldsmobile all models except those with coolant recovery.
Pontiac:
1967-1969: Pontiac Firebird all models.
Chevrolet:
1962-1964: Chevrolet Chevy II with A/C and HD radiator.
1964: Chevelle, Corvette
1965-1967: Chevrolet Chevy II, Bel Air, Impala, Biscayne, Caprice, Suburban, Chevelle.