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 totow 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.....