Multiple issues with 2004 Pontiac Grand Am, V6
My Grand Am has started making a knocking noise in the last week when I turn on my AC. I assume the compressor is going out but how can I be sure? It still blows cold air (albeit only when I turn it up to max, a different problem?) but I don't want to wait on it to quit completely if it is going to do so I need to figure out how much it is going to cost to replace it. Also, if I need to change the compressor how will it affect the rest of my AC system? Meaning will I need a professional to adjust my cooling system if I have to change the compressor, or is this just a part swap? Please advise, thank you.