A 1989 Buick Century with a 3.3L V6 most likely used
R-12 (Freon 12) refrigerant in its air conditioning system. R-12 was the standard refrigerant in cars manufactured before the mid-1990s. However, it's crucial to
check the sticker on the underside of your car's hood for definitive confirmation. This sticker should indicate the correct refrigerant type.
Keep in mind that R-12 is no longer manufactured due to its ozone-depleting properties. If your system needs recharging, it will require a conversion to a compatible refrigerant, such as R-134a, along with necessary system modifications.
