Most of the Class A gas jobs do have a very low tow rating. I looked at a few new ones a couple years back and about the highest I found was 5000 pounds, not enough for car and trailer. But heck go to the track and there are a ton of them there and they are all pulling 24-32 foot enclosed trailers with tons of stuff in them. My buddy has a 32 foot and pulls a 28 foot trailer with a pro gas car and its loaded with tools. Its got the vortec big block and he runs about 6 mpg. Been all over the country with it. I say hook it, try it, and you will know if can pull the load.