Towing capabilities of a Silverado

It's me bozo yet again...I forgot to mention that my truck is a duramax diesel....dualie....allison tranny....trailer hauling package....
 

Basically anything you can hook behind it is what you can pull.

Now that we know what kind of truck you have I agree with EurogoldLS.
 
I have a 2008 Guide to Towing published by Trailer Life
 
Per this guide:
a 3500 with 6.6L engine, duel rear wheels should be able to tow 15,900
based on that figure you should have no problem towing the RV you were looking at.
 
Good luck,
www.trailerlife.com  - check it out
  

15,900 like he said nad a Gross combined of 23,500.....