Well my 09 traverse a/c quit working. Got 3 flashes when button is depressed= all refrigerant lost. Diagnosis...... Replace a hose under the hood $90 part....and... Replace the hose assembly that goes to the rear a/c. It goes the entire length of the vehicle costs $700 and takes 5 hours to install. Total estimate $1700.00. Just to replace 2 leaking hoses. Anyone have any ideas. Researched patching with epoxy but see it will probably not hold. It is an aluminum pipe that is leaking.