Class 1
Class I
It appears to be equipped for trailer brakes.
The trailer harness plug should be located behind the rear license plate holder. Some 1997 Chevrolet Tahoe's were not equipped with the trailer harness plug.
HGV drivers need a Category C license. The Category C license is used for drivers of large vehicles not weighing more than 750kg. The vehicle is usually a large truck where the cab is permanently attached to the trailer.
A trailer hitch... (if equipped)
In the United States you do not have to have a separate license to drive a trailer, unless it is very large or you are doing it for hire.
Trailer ratings are based on the total weight of the trailer and boat.
Specific rules vary by state, but in Washington state you have to have a license plate on every trailer no matter what size it is.
plate
Yes, you must apply for a recreational vehicle license. You must have license plates on the back of your trailer.
A concession trailer requires inspection. To operate one a Colorado Commercial Food Trailer Health Permit is required.
It would require a Class B CDL, without an air brake restriction (there is no air brake endorsement - only a restriction if you don't pass the written air brakes test and perform your pre-trip and road tests in a vehicle so equipped). You would only need a Class A if that vehicle was going to tow a trailer with a GVW in excess of 10,000 lbs.