Nothing...so far so good.
Everything so far has worked out as planned. I have a black demo with the navigation system and it works like a charm. The rear parking assist is a blessing and the seats are really comfortable. What I really like is the DOD (displacement on demand) becausue you really can't feel when it disengages from 8 cylinders to 4. I like the idea of the Flex Fuel b/c that saves a bundle on gas. If you can find a station. The XM radio is cool and the design is slick. I may never get rid of this one.
A Chevy of the 50's for today's need. Take a 55 pick-up, add softer bushings, modern shocks and tires, car-like interior and you got it! Illusion is the key, and the reminder is when you push it and try to keep the pace.