I need to put Freon in my 1999 Suzuki Grand Vitara. I cannot find where to put the Freon. Can someone tell me where the valve to the compressor is? I believe there is a leak but not sure. I had the compressor replaced in 5/2013 and the expansion valve and receiver drier replaced 8/2010. They put dye in the system put they can never find where the leak is. The AC system in my car is frustrating because I felt like I've replaced everything. Should I have them just replace all hoses?