I just drove my 2012 Yukon XL from Washington D.C. to Knoxville through our first challenging Winter weather. When we got within 60 miles of the state line (north of Tennessee while still in Virginia) we ran into some real snow and ice on the roads. We had to drive from about that point south to Knoxville, TN. I had to use the Four Wheel Drive for that length of the trip - over 2 hours at varying speeds. The vehicle never missed a beat. There were cars, trucks, and semis in the ditch or over turned along the way. The Yukon had zero problems. I watched the transmission temp the entire time. It never got over 135 degrees. Very impressed. Very pleased. Having a 21 month old in the vehicle with me certainly made for a nervous trip. The Yukon didn't let me down. Very happy I had it with 4WD High - worked like a champ.