Well.. bought my truck in October. Turned on the AC for the first time today and it was nice and hot... Kids were sweating up a storm on the drive home.. 2014 LTZ crew w/short box with 74k. Too late to call a dealership tonight but I'll see what's up tomorrow.
Thank you for the information all. Hopefully I can see what is up and if I find the crack it can be taken care of easily and cheaply too. I just dropped a lot of money into an audio system and really don't want to rip it all back out...