I have been driving my truck for about a year & a half. I was excited at first because it was new. Now I am still excited! The Duramax/Allison is a just a great design. There is so much power for towing. This truck should come with a warning light reminding you that a trailer is attached because you will forget that it's there! No more "white knuckle" driving while towing, built in brake controller works really well. This is just flat out awesome! The seats are like flying 1st class, interior is much improved. SLT has all the goodies, more like a luxury car, except it's a truck. Why have a car anymore?
Comfort. And it's quiet. Fuel economy. Towing. Power.
Driver side grab bar, ladder system to get into the truck bed (like the Ford) & motorized mirrors, or lowered mirrors for better visability out the sides/doorposts.