Starting up a business here in the next few days, going to be buying a truck to yank around a 12,000 GVW trailer. I have basically narrowed my search to one of the following trucks. I won't buy a truck without a full 8 foot bed. i expect to drive 20-30k a year 12V dodge cummins 1 ton. likely an extended cab I won't buy a V8 diesel, after looking a dozens of them 7.3, 6.0, 6.4, 6.6Dmax. A v8 is great for higher rpm horse power, which is great for a few applications like tub grinders or boats, but stupid for a truck. I get why people buy them, but I'm not interested in owning one. Chevy/GMC 2500HD with a 6.0L roughly a 2004-2006. probably a regular cab. All things being equal I really only care about yearly operating cost. Any input on a rough estimation, or difference between the two?