I need help from some experts. I am in the process of buying a 1-ton dually, rackbody, dump for my landscaping business. I am looking at GMC's. We will use it for towing mowers/Kubota backhoe/bucket. Also delivering loam, bark mulch, trees. Plowing and sanding in winter. 10-15,000 miles per year. My question is this....gas or diesel? I've priced out both and the Diesel is about $7,000 more. If I go this route, I'd like to know that I will make out better in the long run. What do you think? Thanks in advance for any help.