While searching for another duramax on the cheap, I ran across a very nice 02 ccsb 4x4 6.0. I have a car for work and my wife has her own vehicle to drive. The trucks sole purpose in life will be to pull our 28 foot bumper pull camper toy hauler (around 7k max) within a couple hours once a month or so. I know they get terrible mileage but not a big deal for its seldom use. Are they pretty reliable? 4l80e correct? Decent trans?