This is my first Yukon and post on this site so please be patient if I break any rules or decorum. I did read a bunch of battery threads, but didn't see any on a brand new purchase. I purchased my Yukon Denali in early December 2017. I have only put 300 miles on it. I drove it yesterday, backed it into the garage at 6pm. This morning at 7am battery was completely dead. Tried to jump with a starter pack, no dice. Tow truck tried to start with jump start, no dice after 10 minutes of charging. Luckily I was able to get it enough juice to get it into neutral, but just barely. It's at the dealer now and they say the battery was stone dead, but holds a charge. They say it is good and don't see any draws when parked. They are keeping it over night for observations. However, I wanted to check with the experts here to see if this as been experienced before and if any issue/resolution was identified. Thanks in advance!