My 2015 Denali also came with one RKE fob bought another one on eBay from a locksmith for around $70-$80 don't remember and when the sales manager asked me if there was anything else he could do for me ? I said yes program my new RKE fob and cut the hidden key inside the RKE fob .... They did it for free... I tried programming myself step by step like in the owner's manual couldn't do no it at home , in hind sight when I bought the used truck I should have negotiated for the extra key and be ready to walk away ...... Hope this helps ...