It says what weight you can tow right in the owners manual. At least all the ones I have looked at do.
It's not whether or not the truck can tow it, it's how's your driving skills and most important is it safe.
A dealer told my BIL his 1/2 GMC would tow his 30' TT and it does. He is 500# under the max limit with it. He can't keep it on the road with a 5 mph breeze.
He white knuckles it everywhere. Therefore, to him, RVing is not relaxing and will stop camping very soon because he can't adjust to the idea that maybe he should have gone to a heavier truck.
He is one of the many that buy a TV that looks pretty and then tries to find a rig that is the biggest he can tow.
