The Suburban has the tow package and is rated to tow up to 7700 lbs. The boats dry weight is 6700 lbs and loaded with fuel and water will add another 1000 lbs. The trailer w/ surge brakes is most likely 1200 lbs putting the whole package over 9000 lbs. I only plan on towing no more than 3 miles each way and probably no faster than 40 mph on relatively flat roads. Any opinions, will this cause and damage?