I assume you are confused as all duallies are 1ton (without getting into medium or heavy duty trucks).
At 17k, you are probably beyond the weight ratings of a 3/4 ton. Check all the weight ratings of the truck vs the trailer but for 5th wheels, it's usually the pin weight that limits the truck. You are probably looking at a pin weight on the order of 3500lbs plus a couple hundred for the hitch and anything else you haul (if the 17k is empty weight add in another 500lbs to the pin weight to account for loading it up with stuff).
A 1ton SRW might work but probably into 1ton dually range.