Agree, GO BUCKS!! Agree, lots to learn. Huge difference in #s listed. 4500# is likely the dry weight....as in bare bones, naked, empty. You'll have another # for GVWR in the trailer. Allow yourself about 1000# from that figure. Lots more to learn and others better to answer your questions. Suggestion is DO NOT get in a hurry. Some have and then are in the market for a new truck or to sell the trailer they just bought. Lots to learn about your truck as well. Get your calculator. Good luck....we've all been there.