How do you add air conditioning to your 1991 Chevrolet k 2500 pickup?

Answer 1

Well, first off you do not add air conditioning; you must add refrigerant. Your year of truck uses r12 refrigerant which is hard to come by these days and is very expensive;

(around 50-100 dollars per pound) and depending if you have an extended cab or a single cab determines how large of a system capacity your truck uses. You can take it to a shop and let them diagnose your a/c and see exactly what it calls for and if it is worth charging with r12 or converting it to the new r134a which is found in today's automobiles. If converting you may use your original equipment if it is in decent shape. They must flush your system of your old r12 refrigerant and refill with the correct oil and refrigerant. If this is too difficult for you to understand you should not try to fix it yourself but take it in to a shop that specializes in air conditioning because you could cause more damage than good.