what type of refrigerant liquid would i buy for a 1999 buick lesabre custom? on 1999 Buick Century

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My A.C wont blow out cold air and i want to know how to fix it.
(2) Answers
If you need to top it up you have a leak, you need a tech to look at it.
It's more then likely 134 refrigerant if you do try to do it you self which I recommend not to.
Buy the refrigerant with dye so you can see we're the
Leak is
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