just wondering is there such thing

www.envoyforums.com
They have a section for Denali's

moved to car chat :)

www.gmfullsize.com

Depends on what kind of stuff you're looking for.

There are forums of one kind or another for just about every vehicle sold on the market today...not just here in the U.S., but worldwide.....even for entry-level cars like the Hyundai Accent and Kia Rio.
However, few, if any have the quality and sophistication of Club Lexus.

My friend uses SUVworld.com theres a pretty big devoted following over there, even though the site is open to all SUV's its mostly Denali's...