anyone using a Thule cartop roof bag on 2006 GMC Yukon XL roof rack directly?

[mspollack]

I have a 2006 GMC Yukon XL factory roof rack with the crossbars and I'm wondering if I can attach a cartop roof bag to the rack without having to first get a new aftermarket base rack system or something. I 'm most interested in the Thule 866 Escape bag and the Thule 856 Nomad bag. Is anyone using one of these bags on the Yukon XL roof rack directly?

[donq56]

I'm using the Thule 866 Escape II roof bag on my 06 GMC Yukon XL roof rack bars no problem. A word of caution, go with the Thule 866 Escape instead of the 856 Nomad. I had to return the Nomad because it wasn't fully waterproof. Ditto for all cheap cartop roof bags I think. This is a case of you get what you paid for!