Believe it or not but the Liberty is a fairly stout tow vehicle. The GVWR for that trailer is 3500lbs, well below the tow rating. You'll have no problems towing it. As for the hitch it usually has 2 ratings, one for weight carrying (dead weight) and one for use with a weight distributing hitch. Is there a sticker on it that specifies? Either way even rated for 500lbs you should be ok. Even if you load the trailer to the max GVWR it's unlikely that you will exceed 500lbs of tongue weight. The receiver should have a 2" square opening, if so it is likely a class 3 receiver and will be fine as long as you use a good WD hitch with it.
