I bought this 2016 Sierra last month, not realizing that it did not including Apple Carplay. I was disappointed to know I bought one of the shorts. Well, here comes @th3magpi3 to save the day. He told me I only needed a new HMI 2.5 and I would need to update my radio. I ordered the HMI 2.5 on ebay then sent my radio module along with the new HMI 2.5 to be re-programming. In less than a day of receiving my parts, they were re-programmed and on their way to back me. Installation was easy and now I have a fully functional 2016 Sierra.