Bought for my 2004 Chevy Suburban 2500 4x4. It came stock with what is called the Autoride system. They are very expensive to replace with the stock shocks. When the Autorides wear out its a very rough ride. I bought all 4 shocks, and WHAT a GREAT difference in ride! We also have a 2012 Suburban 1500 4x4 LTZ. My wife nicknamed the LTZ Burb the Caddy becuase of its great ride. Got to say the 3/4 ton Burb is stiffer, but its got a great ride now too! I also replaced all 4 bump stops too.