One more 'good boy' pat for Roadmaster -- an excellent product and good CS.
Installed them on my 2003 GMC right after I bought it ... gave me years of service. Removed them when I sold that truck, and am getting ready to modify it (I hope) to install it on my new Chevy 2500HD...
Took one trip to the west without it - Rockies - new truck ran fine, no issues, but did miss that anti-sway factor on the winding roads and turns ... it's not so much I felt better with it on (Drove that GMC many times on Rockies and other mountain areas), but didn't actually notice how much difference it makes until driving a truck without one. That's when you really notice the change.