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What type of freon in cooling system on a buick lesabre?

Buick Lesabres from the years when they used Freon (R-12) generally transitioned to R-134a. You cannot definitively say what refrigerant is in a specific Buick Lesabre without checking the system's sticker or service records.

* 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.