Hello, Just seeing if anyone else out there is experiencing any/heard of any problems with the new 6.0L they are running in the 2500HD's So far, I've got 11k miles and its starting to get worse. Along with the ping, now I've got 'knocking' when pulling the trailer or even when climbing unloaded. Most of my miles are highway, but now as the season is in full swing, getting a lot of heavier towing miles under my belt. I pull some heavy loads, but nothing that should cause a problem this early in the game. I've seen a lot of talk on other forums about similiar problems, and am not liking the verdict. Seems to be a common problem and GM seems to be denying any type of problems so far. I scheduled an appointment for tomorrow, so will see how that goes, but am thinking this could be one of those long, ugly, journies into never, never land. Talk around the net is that they really haven't had any solid solutions, so I am guessing I will be picking my truck up tommorow with a lot of questions unanswered. I pray this problem can be fixed, as this is my only truck and the last thing I need is to be going to the dealer every month to argue my case while they sit there and claim nothing is wrong.