It is necessary to have a commercial driver's license to drive a commercial truck. There are several sites on the internet that list used commercial trucks for sale including www.thepetestore.com, www.commercialtrucktrader, truckertotrucker.com, and autotrader.com.
You can go to their website http://www.gmc.com/commercial-vehicles.html . You can also go to your local GMC dealership and talk to a salesman who would gladly answer all of your questions regarding GMC commercial trucks.
A Volvo Trucks/Mack Trucks dealer would be your best bet.
According to GMC, their trucks "get the job done" so they would be good for commercial hauling. However, you should always comparison shop and take into account price, financing options, and warranties.
Automatic truck wash stations exist for commercial trucks. On top of this, commercial high pressure washers can also be used for rinsing and cleaning trucks in as thorough a manner as possible.
Isuzu commercial trucks are widely available and carried by many truck resellers. A full list of stockists can be found by state and country on the Isuzu website or it would be possible to search for them on sites such as Autotrader.
Because they are supposed to be for scenic pleasure driving and commercial vehicles would ruin that purpose.
No, you can get a commercial policy for a commercial vehicle. If it's for a company you work for, I would make sure they had proper insurance before you drove the vehicle.
Hummer
For the most part, it is a lot cheaper to drive several thousand trucks across the US to deliver supplies then it would to fly just a couple hundred planes. Also, each town would have to have their own little airport to support the planes coming in to drop off supplies, or they would still have to load supplies on trucks to deliver it to smaller towns. Economically and financially, it is more advantageous to use commercial trucks.
I own a small courier company. We are incorporated. We have to have commercial auto as our consumer auto company said they wouldn't cover accidents we had while doing business with our vehicles. Plus they are owned by the company. I would check with my accountant. If your trucks are owned by the company I would assume you would have to have commercial auto. If a driver is using the vehicle on a job has an accident your company is liable, right? If the vehicle is generating income it would fall under the commercial umbrella where commercial insurance would be needed.
There are a few different meanings for the word "drove". One meaning is "a large number of people doing the same thing". An example of a sentence using the word "drove" with this definition would be as follows: A drove of people flocked to the new water park on the day it opened.
Here is a site where you can post or answer classified ads for commercial trucks: http://www.commercialtrucktrader.com/ . For consumer trucks, I would try Craigslist first. Remember to take the proper precautions, though.