I purchased a new 2017 Silverado LTZ Z71 5.3 with the 6 speed 3.42 gears. I test drove it for only 6 miles. I love everything about this truck but the powertrain. I went in to my dealer and told them that I was not happy with the shifting and the power of the truck. At this point I had 1200 miles on it. (Mind you I just sold my 2004 Silverado SS that would run 12.50's in the 1/4 mile). So they let me test drive the exact same truck but with a 6.2 8 speed with 3.23 gears. I told them I would like to put some miles on it so I did. Now I am trading it in for the new 6.2 8 speed. There is a huge difference in performance. I took a $3000 hit but it was my fault and the dealer is swapping my 22" wheels on the new truck. Whipple is now in the future. Oh..... Black thats the color.