I am new to the forum, but want to share this info on the Silverados based on personal experience. I have owned at least 4 Silverados over the past ten years with no issues. I came to the site to see if others were experiencing issues with the 2014 or 2015 Silverados. There appears to be much more than I thought. In August 2014, I bought a 2014 Z71, trading in my 2011 model. While I was driving it home from the dealership and reaching about 40mph, I noticed a significant vibration. It felt like I was driving on a road full of pebbles. I called the dealership and they thought it was flat spots on the tires. Two weeks later same problem. Had the truck into the shop 4 different times, once for two straight weeks, over a 6 month period. Four technicians noticed the vibration but could not diagnose it. The rearend was replaced, the shocks were replaced, the tires were replaced, etc., etc. I finally got to the point where I filed a claim with GM. they COULD NOT fix the problem and GM gave me a new 2015 Z71. I had to pay the difference of MSRP which was $800.00, but all my pmts up to this date were applied to the new truck. I was quite pleased with the 2015 until I reached about 500 miles on the new truck. I noticed a vibration, same as the 2014 but only after I reached highway speeds, 60mph and up. I thought I was being paranoid and tried to convince myself that it was not there. Well, my wife and I took a 400 mile trip by highway, and about an hour into the trip, she asked me what was wrong with the truck. She was feeling vibration in her seat and floorboard. Now I am back where I started with the 2014 issues. During this same trip, I ran into a friend who had bought the 2015 Silverado 2500HD. He said his truck vibrates to the point where his outside mirrors are shaking. Granted completely different truck but seems all too common among the GM trucks. He was bringing it back to the dealership. As frustrated as I am at this point, I want to note that GM was very good to deal with on the issue with the 2014. Now I am either going to let the dealership try to fix the 2015, or I am going to visit Ford.
There is an attorney firm in New Jersey that handles the Lemon Law cases for free. You can find them on the web under Lemon Law for GM or similar. I did not have to use them but they did give me a free consultation. Hope this is somewhat helpful to those with issues.