For the first half of the year I have been putting off seriously looking into upgrading my truck to a more powerful work truck which I have been planning on doing since last year but I have just been to busy to think about it. Within the last 2-3 months, I've had the truck in the shop 3 times and twice in the transmission shop and is currently sitting in the shop with more engine work. I've put $5,500 in the past 2 months and was told the engine might be done in the next 15,000 miles. Anyways, I currently have a Ram 1500 V8 5.7L regular cab with a 8ft bed 1/2 ton and pull a 12ft trailer with either two wright standards, a grasshopper 61" or up to 8,000 lbs in materials when landscaping. I've been looking at the chevy 2500HD diesel as the new truck. Guys I have talked to have said the allison transmission is the best and their 6.6L diesel engines have power to spare. I have no personal experience to say this truck is a great work truck or not so I want to see the guys that have one what you think of it. Is there a year that was built better then the others? Any major issues/problems? Gas mpg? How long will they last. I've looked at a few and have found a few 2011 chevy 2500HD 4x4 crew cabs with an extended bed at a dealer down in texas. Its a big and long truck, but i want the extra cab room and need the 8ft bed for grass clippings, debris, and leaves. I appreciate the input guys.