I would look at a dodge with a 5.9 and a 6 speed, I had an 02 Dodge and put 100,000 on it in two and half years and had no problems and it got great fuel milage. I traded it off on a Duramax and although I like the creature comforts of the chevy when it come to pulling a trailer the Dodge is the to go. The Chevy pulled fine but was the going from 20mpg on the road down to the 8 to 10 mpg when pulling a load that I didn't like. I have since went back to a 05 Dodge, it handles big loads way better and I will get 20 to 22 mpg on the road and 15 to 18 mpg pulling. I don't know where you live but I have a friend that has a 03 Dodge four door dually 5.9 engine 6speed tranny and it has around 60,000 to 70,000 original miles on it for sale, he lives in Camp Point IL (West Central Illinois). I don't remember what he is wanting out of it but I could give you his number if you want.