[GPSBob]

I had this sound on my 2015 Limited. Eventually, the AC quit cooling. It was due to low refrigerant, in my case caused by a leak in the condenser. I had the condenser replaced and the system recharged, and it was fine again with no hissing. However, that was about 2 years ago, and now it's hissing again. I think I'll need at least another recharge, but it's obviously still leaking somewhere.