My wife and I have noticed they might take just a little longer to heat up but not bad. They do heat up enough for both of us, she even turned hers down to 2 yesterday which she rarely does in our Yukon. What is your build number? Mine is 7035.By slow, I mean 8 minutes or longer and not very warm, Both driver and passenger seats are the same. My 2013 heats quicker and warmer. Anybody else having this experience?
Try the re-flash, it will sort out some other issues also. Before you take it in check with your dealer to make sure that the car has not already been re-flashed. If it has then this fact will add to the "knowledge pool" here, though it might not help you and your particular circumstance. Keep us posted and please add your issue into the "issue & resolution thread".No, no reflash of any kind