* Older Lesabres (pre-1990s): Most likely used R-12, which is now banned due to its ozone-depleting properties.
* Newer Lesabres (1990s and later): Almost certainly used R-134a, a more environmentally friendly refrigerant.
To find out for sure:
1. Look for a sticker: Check the underside of the hood, near the radiator or AC compressor. There might be a sticker indicating the refrigerant type.
2. Check service records: If you have maintenance records for the vehicle, they might list the refrigerant used in past AC services.
3. Have a qualified mechanic check: A professional mechanic can identify the refrigerant using specialized equipment.
Important Note: Do not attempt to work on your car's AC system yourself unless you are properly trained and equipped. Refrigerants can be hazardous if mishandled.