I plan on buying a new pickup this comming summer. I never knew that chevy made a 3500 with the single wheels in the back. My question is.. Is it better to go with a 2500hd (crew cab long bed) or to go with the 3500 (crew cab long bed), both being diesels. The trucks look exactly the same, except one can hold more than the other. Will the 3500 consume more fuel over the 2500hd? I won't be towing anything outragious, but from what i understand, it's allways better to have more than you need. I don't hear too much, or see, people driving driving these 3500's with the single wheels. Is the 3500 to much of a truck? Any thoughts on the two?