I just got a 2008 3500 with the 6.7 turbo diesel 6 speed auto and I am having problems with the new emissions system I do alot of very slow driving at times and the build up is killing me the dealer says it is the way it is. The truck is awsome in all ways except that I cant go up in the mountains to hunt with it. any suggestions? I am a security guard and also I patrol the woods during hunting season. but with the new truck I cant go slow for lg periods of time.