I have a 99 B2500 5 speed. I know that my bumper hitch is rated at 2000 lbs, but how much can I tow if I get a frame hitch? I know the manual probably says how much I can tow, but I forgot where I put it. I towed my buddies boat over the weekend a total of 500 miles, and I had to downshift to 3 & 4th gear and floor the truck up some of the mountain hills just to keep speed. I was thinking about shorter distances, and flat roads. We had about 500 lbs of gear in the bed of the truck, and if I had to guess, I would say his boat and trailer weighed about 1000 lbs. I would like to get a slightly bigger boat. My buddy has a 17' boat which weighs 2500 lbs with the trailer. Could I pull that with a real hitch? Here is a pic of the boat I towed this weekend for reference.

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