Towing Limit

Hello Everyone,

First time potential camper here and wanting to make sure I purchase something I can pull with my current truck and not have to buy a new truck after I buy a camper. :) How exactly can I calculate what I can pull with my truck? I have a 2004 Chevy Z71 with the 5.3l and 3:73 gears (I am pretty sure).

Thanks in advance for the help.

Take care