Surprised that GM didn't develop something like this from the factory for the TBSS, or that nobody else made kits like it after the GM Performance Division ceased to exist. Cost a whopping $399 MSRP, yet it was made of cheap enough parts and could be fabbed up by a clever handy person.
Old Truck Trend article from May 1, 2007:
http://www.trucktrend.com/how-to/chassis-suspension/0705tr-2006-chevvy-trailblazer-ss/
Old Truck Trend article from May 1, 2007:
http://www.trucktrend.com/how-to/chassis-suspension/0705tr-2006-chevvy-trailblazer-ss/