Yes the 2013 had a couple of issues with heat problems. See my notes in my signature. (some may not be able to see my sig so I am posting here).
2013 No Cabin Heat? Perform a forum search on: PIC5796 PIC5943 PIC5855 These PIC are known problems with the K10 unit being defective based on date, reprogram or replace the coolant heater control module (CHCM), and finally a stuck valve may need replaced.
The 2013 was plagued with these problems with heat. And there are countless threads on it. Should be covered under a warranty. Even if you cant find info use the three PIC numbers above and take it to you dealership.