First, I've always bought American trucks and mostly of the GM brand.
Second the 2015 (see sig) is really like no other we owned. We had a 2008 prior to this truck. This truck is more than you are looking for but the creature features are the same no matter what LTZ you get and they are fun and exciting. We love the USB ability of the radio and use mostly our own music and audio books. I have 20,000 on my 15' and have had no issues other than a couple goofy recalls (GM , I feel is over reactive now).
I also have the lane change sensor, the front and rear sensors and the air brake. We travel in comfort and safety.