Fits: 2006 Chevrolet Avalanche 1500 2006–2014 Chevrolet Suburban 1500 2006–2013 Chevrolet Tahoe 2006–2007 Chevrolet Trailblazer 2006–2007 Chevrolet Suburban 2500 2007–2013 Chevrolet Avalanche 2006 Chevrolet Trailblazer EXT 2015–2017 Chevrolet Suburban 2006–2013 GMC Yukon XL 1500 2007–2013 GMC Yukon SkyjackerH7030Shocks and StrutsSkyjacker(R) Suspensions offers you a high quality shock absorber with true velocity sensitive valving. Shock absorbers, or spring dampers as it is called everywhere else except in the U.S., control the rate at which suspension springs compress and rebound. As the shock is pushed together, this is called bump or compression. As the shock expands, this is called rebound or extension. Absorbing the ‘shock' of bumps and suspension loading is actually performed by the springs in the suspension. The shock's real job is controlling the energy stored in the springs.