dash air stop blowing cold air

In my chevy truck, I noticed it stopped cooling, not sure if it was compressor or what so I went to Advance Auto, picked up a can of refrigerant called A/C Pro, comes with hose and meter, instructions show all about hook-up, and in approx 15 minutes, after following all instructions, A/C blowing cold again and has been for several months now. Just hope ur compressors not shot. Hope this helps. :)