I realize these are older posts- hoping someone is still here that can help. I'm trying to program a 2nd remote- I have one. 2017 Yukon XL Denali- push button start. My owners manual gives me the same instructions that I find online, I'm going with the have no fobs option- but I cannot get past step one. After I turn the key 5 times counter clockwise- NOTHING HAPPENS. I've tried it with the door open, the door shut, the door locked, unlocked, the key fobs in the cup holder, key fobs in the house- Im stuck. I've been trying to do this for about 5 hours now and am ready to shove my head through a window. It's like my vehicle just doesn't recognize the 5 key turns. And I checked- first number is a 1 in the VIN which means it was made in USA right? What am I missing???