We're starting this post with the Silverado 3500HD Crew Cab Dually, which has a 14,000 lb. gross vehicle weight rating. It is powered by the Duramax diesel and Allison HD automatic transmission and has plenty of creature comforts. The quiet cab has room for up to six adults. So, that is off to a great start, for sure.
We add a 9' Harbor Service Body with the Master Locking System, HD material rack, coated bed area, hitch, and connector. The compartments are huge and 24" deep to carry a lot of stuff, but the real treat here is the 56" high compartments, which give maximum storage to get the job done efficiently and effectively.
This is a rare combination and may be perfect for your needs.
See more about this truck
here.