What kind of freon does a 1992 Buick Lasabr?

A 1992 Buick LeSabre typically uses R-12 refrigerant for its air conditioning system. However, due to the phase-out of R-12 due to environmental regulations, many older vehicles have been retrofitted to use R-134a refrigerant. If servicing the air conditioning system, it's important to check if any retrofitting has been done or consult with a professional mechanic for the proper refrigerant type.