echofive0706

I bought my 2015 GMC Sierra in August with less than 10 miles on it. The clunk noise started as just a small occasional noise, but it just keeps getting louder and more forceful. Now I have 4700 miles on it and the noise is so loud that passengers can feel it slamming into gear especially in stop and go traffic and it happens multiple times during my 15 mile drive to and from work everyday. I took it to Carl Black GMC in Kennesaw, GA yesterday and went for a drive with the mechanic and he said he definitely felt and heard the clunk and that he would check it out. While at the dealership I noticed on the wall a list of other vehicles in for maintenance that day and saw a 2014 Silverado on the list with "transmission downshifting hard" as the reason for the visit. I took a picture of the board in case it helps my case later. Today the tech called and asked me to come in and take it for another test drive because they couldn't reproduce the issue. Now in front of the service manager the same mechanic is saying that he never really heard anything wrong when we went on the test drive together the day before. Then the service manager gave me a GM bulletin stating that the problem I am describing is just "normal driveline clunk" and that it is acceptable. I asked them what amount of "driveline clunk" is normal and at what point does it become abnormal? My truck hasn't even had its first oil change yet and I hate driving it because it sounds like it is going to break apart when it downshifts. I am worried that it will fail at the worst possible time and leave my family stranded on the side of the highway or worse cause us to get into an accident. All I want is for the truck I worked hard for to work right, and to be told that I have to just accept this as my new normal is completely unacceptable. Getting the run around after giving GM my business is a huge slap in the face and having the service department tell me that I just have to get used to it and that I am imagining things isn't going to work for me. I am going to keep playing their game for a little while longer, and if we do not reach an acceptable resolution soon I will be taking legal action to get the problem resolved.