I have a 2005 Trailblazer (with the 4.3 liter engine) and recently bought a Coachmen Catalina 19RD. I believe it weighs in at around 4,200 pounds. Anyway, it was well under the 5,000 or so my Trailblazer was rated at. I got the weight distributing hitch etc as well.
The Trailblazer would pull the trailer... maxed out at 60mph on flat Indiana highways though... Just an FYI. I ended up getting a used Silverado with a 5.3 liter engine and it pulls it just fine now.
BTW, I love the Catalina!
2016 Puma 30RLIS
2011 Catalina 19RD - totalled by hail