Well two things stuck out on the paperwork to me. 1. I have a brand new vehicle with only 5100 miles on it and my tire tread is 8/32 after the break in period , I got online and my tires are good tires and new have a 16/32 tread reading. This means my new truck had used tires on it when they sold it to me and i will be talking to management about that. Secondly my window sticker says 3500 miles until my next oil change. I again got online and recommendations by Chevy is 5w-30 synthetic which would give me a minimum of 5000 to 7500 between oil changes, wondering why they use a lesser oil.