Passenger second and third row AC would stop working for a period of times and then will start working again without warning. Dealership claimed that they could not recreate the problem. Next day after service appointment AC stopped working while driving. I went straight to dealership while it was not working and showed that the problem exists. At that time they acknowledged the problem and kept the vehicle. So far the truck been in their shop for 5 days and they still have no idea what needs to be done to get it fixed or what the issue is.