What type of freon in cooling system on a Buick Century?
Buick Centuries, depending on the year, used R-134a refrigerant in their air conditioning systems. R-12 was used in older models, but R-134a became the standard in later years. You'll need to check your owner's manual or the sticker on the underside of the hood to be absolutely certain, but R-134a is the far more likely refrigerant for most Buick Centuries.