I just got a new 2017 Big Horn. The A/C comes on with my remote start. I haven't seen any settings for what comes on. I know on my Avalanche, it used the ambient temp sensor. If it was below 55 (I think) the heat and defrost came on and it was over 80, the A/C came on. I would definitely get that figured out though. I used to think remote start was stupid til I had one. When it's frosted up, remote start and the defroster clears the windshield. WHen it's 105 out, remote start and it's cool when I leave work!